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Finding the Fourth Proportional to 71,586.64, 98,789.64 and 39,755.60

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Solution

The fourth proportional to 71,586.64, 98,789.64 and 39,755.60 is: 54,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,586.64 : 98,789.64 = 39,755.60 : x
  2. Step 2: Convert to fraction form
    71,586.64/98,789.64 = 39,755.60/x
  3. Step 3: Cross multiply
    71,586.64x = 98,789.64 × 39,755.60
  4. Step 4: Simplify right side
    71,586.64x = 3,927,441,411.98
  5. Step 5: Solve for x
    x = 3,927,441,411.98/71,586.64
  6. Step 6: Final answer
    x = 54,862.77

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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.