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Finding the Fourth Proportional to 62,387.92, 86,104.11 and 39,719.67

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Solution

The fourth proportional to 62,387.92, 86,104.11 and 39,719.67 is: 54,818.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,387.92 : 86,104.11 = 39,719.67 : x
  2. Step 2: Convert to fraction form
    62,387.92/86,104.11 = 39,719.67/x
  3. Step 3: Cross multiply
    62,387.92x = 86,104.11 × 39,719.67
  4. Step 4: Simplify right side
    62,387.92x = 3,420,026,834.84
  5. Step 5: Solve for x
    x = 3,420,026,834.84/62,387.92
  6. Step 6: Final answer
    x = 54,818.73

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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.