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Finding the Fourth Proportional to 99,468.40, 149,747.12 and 90,759.28

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Solution

The fourth proportional to 99,468.40, 149,747.12 and 90,759.28 is: 136,635.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,468.40 : 149,747.12 = 90,759.28 : x
  2. Step 2: Convert to fraction form
    99,468.40/149,747.12 = 90,759.28/x
  3. Step 3: Cross multiply
    99,468.40x = 149,747.12 × 90,759.28
  4. Step 4: Simplify right side
    99,468.40x = 13,590,940,793.27
  5. Step 5: Solve for x
    x = 13,590,940,793.27/99,468.40
  6. Step 6: Final answer
    x = 136,635.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.