Home / 81,389.34-112,356.18-54,210.63

Finding the Fourth Proportional to 81,389.34, 112,356.18 and 54,210.63

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Solution

The fourth proportional to 81,389.34, 112,356.18 and 54,210.63 is: 74,836.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389.34 : 112,356.18 = 54,210.63 : x
  2. Step 2: Convert to fraction form
    81,389.34/112,356.18 = 54,210.63/x
  3. Step 3: Cross multiply
    81,389.34x = 112,356.18 × 54,210.63
  4. Step 4: Simplify right side
    81,389.34x = 6,090,899,302.19
  5. Step 5: Solve for x
    x = 6,090,899,302.19/81,389.34
  6. Step 6: Final answer
    x = 74,836.57

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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.