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Finding the Fourth Proportional to 92,611.60, 138,863.76 and 81,540.52

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Solution

The fourth proportional to 92,611.60, 138,863.76 and 81,540.52 is: 122,263.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,611.60 : 138,863.76 = 81,540.52 : x
  2. Step 2: Convert to fraction form
    92,611.60/138,863.76 = 81,540.52/x
  3. Step 3: Cross multiply
    92,611.60x = 138,863.76 × 81,540.52
  4. Step 4: Simplify right side
    92,611.60x = 11,323,023,199.56
  5. Step 5: Solve for x
    x = 11,323,023,199.56/92,611.60
  6. Step 6: Final answer
    x = 122,263.55

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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.