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Finding the Fourth Proportional to 66,463.60, 99,549.60 and 57,715.60

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Solution

The fourth proportional to 66,463.60, 99,549.60 and 57,715.60 is: 86,446.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,463.60 : 99,549.60 = 57,715.60 : x
  2. Step 2: Convert to fraction form
    66,463.60/99,549.60 = 57,715.60/x
  3. Step 3: Cross multiply
    66,463.60x = 99,549.60 × 57,715.60
  4. Step 4: Simplify right side
    66,463.60x = 5,745,564,893.76
  5. Step 5: Solve for x
    x = 5,745,564,893.76/66,463.60
  6. Step 6: Final answer
    x = 86,446.79

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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.