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Finding the Fourth Proportional to 89,150.78, 133,892.73 and 78,480.92

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Solution

The fourth proportional to 89,150.78, 133,892.73 and 78,480.92 is: 117,868.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,150.78 : 133,892.73 = 78,480.92 : x
  2. Step 2: Convert to fraction form
    89,150.78/133,892.73 = 78,480.92/x
  3. Step 3: Cross multiply
    89,150.78x = 133,892.73 × 78,480.92
  4. Step 4: Simplify right side
    89,150.78x = 10,508,024,966.44
  5. Step 5: Solve for x
    x = 10,508,024,966.44/89,150.78
  6. Step 6: Final answer
    x = 117,868.01

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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.