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Finding the Fourth Proportional to 124,041.20, 186,061.80 and 89,049.20

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Solution

The fourth proportional to 124,041.20, 186,061.80 and 89,049.20 is: 133,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,041.20 : 186,061.80 = 89,049.20 : x
  2. Step 2: Convert to fraction form
    124,041.20/186,061.80 = 89,049.20/x
  3. Step 3: Cross multiply
    124,041.20x = 186,061.80 × 89,049.20
  4. Step 4: Simplify right side
    124,041.20x = 16,568,654,440.56
  5. Step 5: Solve for x
    x = 16,568,654,440.56/124,041.20
  6. Step 6: Final answer
    x = 133,573.80

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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.