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Finding the Fourth Proportional to 64,753.28, 89,372.78 and 40,863.88

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Solution

The fourth proportional to 64,753.28, 89,372.78 and 40,863.88 is: 56,400.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,753.28 : 89,372.78 = 40,863.88 : x
  2. Step 2: Convert to fraction form
    64,753.28/89,372.78 = 40,863.88/x
  3. Step 3: Cross multiply
    64,753.28x = 89,372.78 × 40,863.88
  4. Step 4: Simplify right side
    64,753.28x = 3,652,118,557.19
  5. Step 5: Solve for x
    x = 3,652,118,557.19/64,753.28
  6. Step 6: Final answer
    x = 56,400.52

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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.