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Finding the Fourth Proportional to 231,397.94, 319,322.76 and 129,423.59

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Solution

The fourth proportional to 231,397.94, 319,322.76 and 129,423.59 is: 178,600.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,397.94 : 319,322.76 = 129,423.59 : x
  2. Step 2: Convert to fraction form
    231,397.94/319,322.76 = 129,423.59/x
  3. Step 3: Cross multiply
    231,397.94x = 319,322.76 × 129,423.59
  4. Step 4: Simplify right side
    231,397.94x = 41,327,897,967.91
  5. Step 5: Solve for x
    x = 41,327,897,967.91/231,397.94
  6. Step 6: Final answer
    x = 178,600.98

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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.