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Finding the Fourth Proportional to 88,913.80, 133,042.65 and 81,040.60

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Solution

The fourth proportional to 88,913.80, 133,042.65 and 81,040.60 is: 121,261.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,913.80 : 133,042.65 = 81,040.60 : x
  2. Step 2: Convert to fraction form
    88,913.80/133,042.65 = 81,040.60/x
  3. Step 3: Cross multiply
    88,913.80x = 133,042.65 × 81,040.60
  4. Step 4: Simplify right side
    88,913.80x = 10,781,856,181.59
  5. Step 5: Solve for x
    x = 10,781,856,181.59/88,913.80
  6. Step 6: Final answer
    x = 121,261.90

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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.