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Finding the Fourth Proportional to 88,709.90, 133,064.85 and 81,452.30

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Solution

The fourth proportional to 88,709.90, 133,064.85 and 81,452.30 is: 122,178.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,709.90 : 133,064.85 = 81,452.30 : x
  2. Step 2: Convert to fraction form
    88,709.90/133,064.85 = 81,452.30/x
  3. Step 3: Cross multiply
    88,709.90x = 133,064.85 × 81,452.30
  4. Step 4: Simplify right side
    88,709.90x = 10,838,438,081.66
  5. Step 5: Solve for x
    x = 10,838,438,081.66/88,709.90
  6. Step 6: Final answer
    x = 122,178.45

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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.