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Finding the Fourth Proportional to 231,129.62, 318,957.29 and 129,155.33

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Solution

The fourth proportional to 231,129.62, 318,957.29 and 129,155.33 is: 178,233.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,129.62 : 318,957.29 = 129,155.33 : x
  2. Step 2: Convert to fraction form
    231,129.62/318,957.29 = 129,155.33/x
  3. Step 3: Cross multiply
    231,129.62x = 318,957.29 × 129,155.33
  4. Step 4: Simplify right side
    231,129.62x = 41,195,032,451.07
  5. Step 5: Solve for x
    x = 41,195,032,451.07/231,129.62
  6. Step 6: Final answer
    x = 178,233.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.