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Finding the Fourth Proportional to 231,362.62, 319,296.69 and 129,397.57

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Solution

The fourth proportional to 231,362.62, 319,296.69 and 129,397.57 is: 178,577.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,362.62 : 319,296.69 = 129,397.57 : x
  2. Step 2: Convert to fraction form
    231,362.62/319,296.69 = 129,397.57/x
  3. Step 3: Cross multiply
    231,362.62x = 319,296.69 × 129,397.57
  4. Step 4: Simplify right side
    231,362.62x = 41,316,215,795.04
  5. Step 5: Solve for x
    x = 41,316,215,795.04/231,362.62
  6. Step 6: Final answer
    x = 178,577.75

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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.