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Finding the Fourth Proportional to 88,261.80, 132,392.70 and 81,781.80

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Solution

The fourth proportional to 88,261.80, 132,392.70 and 81,781.80 is: 122,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,261.80 : 132,392.70 = 81,781.80 : x
  2. Step 2: Convert to fraction form
    88,261.80/132,392.70 = 81,781.80/x
  3. Step 3: Cross multiply
    88,261.80x = 132,392.70 × 81,781.80
  4. Step 4: Simplify right side
    88,261.80x = 10,827,313,312.86
  5. Step 5: Solve for x
    x = 10,827,313,312.86/88,261.80
  6. Step 6: Final answer
    x = 122,672.70

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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.