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Finding the Fourth Proportional to 92,600.55, 138,736.80 and 78,494.40

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Solution

The fourth proportional to 92,600.55, 138,736.80 and 78,494.40 is: 117,602.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,600.55 : 138,736.80 = 78,494.40 : x
  2. Step 2: Convert to fraction form
    92,600.55/138,736.80 = 78,494.40/x
  3. Step 3: Cross multiply
    92,600.55x = 138,736.80 × 78,494.40
  4. Step 4: Simplify right side
    92,600.55x = 10,890,061,873.92
  5. Step 5: Solve for x
    x = 10,890,061,873.92/92,600.55
  6. Step 6: Final answer
    x = 117,602.56

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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.