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Finding the Fourth Proportional to 154,200.80, 231,128.40 and 65,439.20

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Solution

The fourth proportional to 154,200.80, 231,128.40 and 65,439.20 is: 98,085.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,200.80 : 231,128.40 = 65,439.20 : x
  2. Step 2: Convert to fraction form
    154,200.80/231,128.40 = 65,439.20/x
  3. Step 3: Cross multiply
    154,200.80x = 231,128.40 × 65,439.20
  4. Step 4: Simplify right side
    154,200.80x = 15,124,857,593.28
  5. Step 5: Solve for x
    x = 15,124,857,593.28/154,200.80
  6. Step 6: Final answer
    x = 98,085.47

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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.