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Finding the Fourth Proportional to 118,887.60, 178,233.12 and 92,708.40

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Solution

The fourth proportional to 118,887.60, 178,233.12 and 92,708.40 is: 138,985.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,887.60 : 178,233.12 = 92,708.40 : x
  2. Step 2: Convert to fraction form
    118,887.60/178,233.12 = 92,708.40/x
  3. Step 3: Cross multiply
    118,887.60x = 178,233.12 × 92,708.40
  4. Step 4: Simplify right side
    118,887.60x = 16,523,707,382.21
  5. Step 5: Solve for x
    x = 16,523,707,382.21/118,887.60
  6. Step 6: Final answer
    x = 138,985.96

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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.