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Finding the Fourth Proportional to 99,818.97, 149,859.68 and 91,566.69

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Solution

The fourth proportional to 99,818.97, 149,859.68 and 91,566.69 is: 137,470.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,818.97 : 149,859.68 = 91,566.69 : x
  2. Step 2: Convert to fraction form
    99,818.97/149,859.68 = 91,566.69/x
  3. Step 3: Cross multiply
    99,818.97x = 149,859.68 × 91,566.69
  4. Step 4: Simplify right side
    99,818.97x = 13,722,154,404.23
  5. Step 5: Solve for x
    x = 13,722,154,404.23/99,818.97
  6. Step 6: Final answer
    x = 137,470.41

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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.