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Finding the Fourth Proportional to 231,335.70, 347,003.55 and 138,023.70

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Solution

The fourth proportional to 231,335.70, 347,003.55 and 138,023.70 is: 207,035.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,335.70 : 347,003.55 = 138,023.70 : x
  2. Step 2: Convert to fraction form
    231,335.70/347,003.55 = 138,023.70/x
  3. Step 3: Cross multiply
    231,335.70x = 347,003.55 × 138,023.70
  4. Step 4: Simplify right side
    231,335.70x = 47,894,713,884.14
  5. Step 5: Solve for x
    x = 47,894,713,884.14/231,335.70
  6. Step 6: Final answer
    x = 207,035.55

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1.5x scale

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.