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Finding the Fourth Proportional to 99,534.30, 148,869.45 and 89,079.90

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Solution

The fourth proportional to 99,534.30, 148,869.45 and 89,079.90 is: 133,233.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,534.30 : 148,869.45 = 89,079.90 : x
  2. Step 2: Convert to fraction form
    99,534.30/148,869.45 = 89,079.90/x
  3. Step 3: Cross multiply
    99,534.30x = 148,869.45 × 89,079.90
  4. Step 4: Simplify right side
    99,534.30x = 13,261,275,719.06
  5. Step 5: Solve for x
    x = 13,261,275,719.06/99,534.30
  6. Step 6: Final answer
    x = 133,233.22

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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.