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Finding the Fourth Proportional to 117,781.60, 176,672.40 and 71,125.60

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Solution

The fourth proportional to 117,781.60, 176,672.40 and 71,125.60 is: 106,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,781.60 : 176,672.40 = 71,125.60 : x
  2. Step 2: Convert to fraction form
    117,781.60/176,672.40 = 71,125.60/x
  3. Step 3: Cross multiply
    117,781.60x = 176,672.40 × 71,125.60
  4. Step 4: Simplify right side
    117,781.60x = 12,565,930,453.44
  5. Step 5: Solve for x
    x = 12,565,930,453.44/117,781.60
  6. Step 6: Final answer
    x = 106,688.40

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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.