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Finding the Fourth Proportional to 99,690.72, 149,568.48 and 66,545.52

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Solution

The fourth proportional to 99,690.72, 149,568.48 and 66,545.52 is: 99,839.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,690.72 : 149,568.48 = 66,545.52 : x
  2. Step 2: Convert to fraction form
    99,690.72/149,568.48 = 66,545.52/x
  3. Step 3: Cross multiply
    99,690.72x = 149,568.48 × 66,545.52
  4. Step 4: Simplify right side
    99,690.72x = 9,953,112,277.21
  5. Step 5: Solve for x
    x = 9,953,112,277.21/99,690.72
  6. Step 6: Final answer
    x = 99,839.91

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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.