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Finding the Fourth Proportional to 62,465.92, 86,231.12 and 39,835.28

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Solution

The fourth proportional to 62,465.92, 86,231.12 and 39,835.28 is: 54,990.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,465.92 : 86,231.12 = 39,835.28 : x
  2. Step 2: Convert to fraction form
    62,465.92/86,231.12 = 39,835.28/x
  3. Step 3: Cross multiply
    62,465.92x = 86,231.12 × 39,835.28
  4. Step 4: Simplify right side
    62,465.92x = 3,435,040,809.91
  5. Step 5: Solve for x
    x = 3,435,040,809.91/62,465.92
  6. Step 6: Final answer
    x = 54,990.64

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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.