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Finding the Fourth Proportional to 99,850.64, 149,128.58 and 90,471.92

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Solution

The fourth proportional to 99,850.64, 149,128.58 and 90,471.92 is: 135,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,850.64 : 149,128.58 = 90,471.92 : x
  2. Step 2: Convert to fraction form
    99,850.64/149,128.58 = 90,471.92/x
  3. Step 3: Cross multiply
    99,850.64x = 149,128.58 × 90,471.92
  4. Step 4: Simplify right side
    99,850.64x = 13,491,948,959.47
  5. Step 5: Solve for x
    x = 13,491,948,959.47/99,850.64
  6. Step 6: Final answer
    x = 135,121.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.