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Finding the Fourth Proportional to 91,861.71, 137,792.51 and 28,687.24

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Solution

The fourth proportional to 91,861.71, 137,792.51 and 28,687.24 is: 43,030.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,861.71 : 137,792.51 = 28,687.24 : x
  2. Step 2: Convert to fraction form
    91,861.71/137,792.51 = 28,687.24/x
  3. Step 3: Cross multiply
    91,861.71x = 137,792.51 × 28,687.24
  4. Step 4: Simplify right side
    91,861.71x = 3,952,886,940.95
  5. Step 5: Solve for x
    x = 3,952,886,940.95/91,861.71
  6. Step 6: Final answer
    x = 43,030.85

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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.