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Finding the Fourth Proportional to 239,138.55, 330,013.31 and 131,712.30

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Solution

The fourth proportional to 239,138.55, 330,013.31 and 131,712.30 is: 181,764.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,138.55 : 330,013.31 = 131,712.30 : x
  2. Step 2: Convert to fraction form
    239,138.55/330,013.31 = 131,712.30/x
  3. Step 3: Cross multiply
    239,138.55x = 330,013.31 × 131,712.30
  4. Step 4: Simplify right side
    239,138.55x = 43,466,811,432.15
  5. Step 5: Solve for x
    x = 43,466,811,432.15/239,138.55
  6. Step 6: Final answer
    x = 181,764.13

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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.