Home / 231,406.72-319,370.85-129,437.84

Finding the Fourth Proportional to 231,406.72, 319,370.85 and 129,437.84

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Solution

The fourth proportional to 231,406.72, 319,370.85 and 129,437.84 is: 178,640.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,406.72 : 319,370.85 = 129,437.84 : x
  2. Step 2: Convert to fraction form
    231,406.72/319,370.85 = 129,437.84/x
  3. Step 3: Cross multiply
    231,406.72x = 319,370.85 × 129,437.84
  4. Step 4: Simplify right side
    231,406.72x = 41,338,672,335.77
  5. Step 5: Solve for x
    x = 41,338,672,335.77/231,406.72
  6. Step 6: Final answer
    x = 178,640.76

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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.