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Finding the Fourth Proportional to 71,389.66, 98,512.31 and 39,557.87

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Solution

The fourth proportional to 71,389.66, 98,512.31 and 39,557.87 is: 54,586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,389.66 : 98,512.31 = 39,557.87 : x
  2. Step 2: Convert to fraction form
    71,389.66/98,512.31 = 39,557.87/x
  3. Step 3: Cross multiply
    71,389.66x = 98,512.31 × 39,557.87
  4. Step 4: Simplify right side
    71,389.66x = 3,896,936,954.59
  5. Step 5: Solve for x
    x = 3,896,936,954.59/71,389.66
  6. Step 6: Final answer
    x = 54,586.86

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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.