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Finding the Fourth Proportional to 231,603.53, 319,540.02 and 129,612.78

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Solution

The fourth proportional to 231,603.53, 319,540.02 and 129,612.78 is: 178,824.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,603.53 : 319,540.02 = 129,612.78 : x
  2. Step 2: Convert to fraction form
    231,603.53/319,540.02 = 129,612.78/x
  3. Step 3: Cross multiply
    231,603.53x = 319,540.02 × 129,612.78
  4. Step 4: Simplify right side
    231,603.53x = 41,416,470,556.48
  5. Step 5: Solve for x
    x = 41,416,470,556.48/231,603.53
  6. Step 6: Final answer
    x = 178,824.87

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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.