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Finding the Fourth Proportional to 62,387.92, 86,104.12 and 39,719.68

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Solution

The fourth proportional to 62,387.92, 86,104.12 and 39,719.68 is: 54,818.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,387.92 : 86,104.12 = 39,719.68 : x
  2. Step 2: Convert to fraction form
    62,387.92/86,104.12 = 39,719.68/x
  3. Step 3: Cross multiply
    62,387.92x = 86,104.12 × 39,719.68
  4. Step 4: Simplify right side
    62,387.92x = 3,420,028,093.08
  5. Step 5: Solve for x
    x = 3,420,028,093.08/62,387.92
  6. Step 6: Final answer
    x = 54,818.75

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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.