Home / 112,409.19-155,120.13-61,423.65

Finding the Fourth Proportional to 112,409.19, 155,120.13 and 61,423.65

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Solution

The fourth proportional to 112,409.19, 155,120.13 and 61,423.65 is: 84,762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,409.19 : 155,120.13 = 61,423.65 : x
  2. Step 2: Convert to fraction form
    112,409.19/155,120.13 = 61,423.65/x
  3. Step 3: Cross multiply
    112,409.19x = 155,120.13 × 61,423.65
  4. Step 4: Simplify right side
    112,409.19x = 9,528,044,573.07
  5. Step 5: Solve for x
    x = 9,528,044,573.07/112,409.19
  6. Step 6: Final answer
    x = 84,762.15

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Half scale
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Double scale
Find fourth proportional to 112,410.19, 155,121.51 and 61,424.65
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.