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Finding the Fourth Proportional to 138,492.80, 207,761.43 and 58,531.56

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Solution

The fourth proportional to 138,492.80, 207,761.43 and 58,531.56 is: 87,806.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,492.80 : 207,761.43 = 58,531.56 : x
  2. Step 2: Convert to fraction form
    138,492.80/207,761.43 = 58,531.56/x
  3. Step 3: Cross multiply
    138,492.80x = 207,761.43 × 58,531.56
  4. Step 4: Simplify right side
    138,492.80x = 12,160,601,050.16
  5. Step 5: Solve for x
    x = 12,160,601,050.16/138,492.80
  6. Step 6: Final answer
    x = 87,806.74

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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.