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Finding the Fourth Proportional to 92,614.60, 138,868.26 and 81,543.52

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Solution

The fourth proportional to 92,614.60, 138,868.26 and 81,543.52 is: 122,268.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,614.60 : 138,868.26 = 81,543.52 : x
  2. Step 2: Convert to fraction form
    92,614.60/138,868.26 = 81,543.52/x
  3. Step 3: Cross multiply
    92,614.60x = 138,868.26 × 81,543.52
  4. Step 4: Simplify right side
    92,614.60x = 11,323,806,736.68
  5. Step 5: Solve for x
    x = 11,323,806,736.68/92,614.60
  6. Step 6: Final answer
    x = 122,268.05

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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.