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Finding the Fourth Proportional to 64,487.76, 96,718.68 and 20,107.32

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Solution

The fourth proportional to 64,487.76, 96,718.68 and 20,107.32 is: 30,156.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,487.76 : 96,718.68 = 20,107.32 : x
  2. Step 2: Convert to fraction form
    64,487.76/96,718.68 = 20,107.32/x
  3. Step 3: Cross multiply
    64,487.76x = 96,718.68 × 20,107.32
  4. Step 4: Simplify right side
    64,487.76x = 1,944,753,448.74
  5. Step 5: Solve for x
    x = 1,944,753,448.74/64,487.76
  6. Step 6: Final answer
    x = 30,156.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.