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Finding the Fourth Proportional to 112,471.65, 155,211.20 and 61,485

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Solution

The fourth proportional to 112,471.65, 155,211.20 and 61,485 is: 84,849.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,471.65 : 155,211.20 = 61,485 : x
  2. Step 2: Convert to fraction form
    112,471.65/155,211.20 = 61,485/x
  3. Step 3: Cross multiply
    112,471.65x = 155,211.20 × 61,485
  4. Step 4: Simplify right side
    112,471.65x = 9,543,160,324.58
  5. Step 5: Solve for x
    x = 9,543,160,324.58/112,471.65
  6. Step 6: Final answer
    x = 84,849.47

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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.