Home / 231,257.77-319,138.10-129,288.89

Finding the Fourth Proportional to 231,257.77, 319,138.10 and 129,288.89

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Solution

The fourth proportional to 231,257.77, 319,138.10 and 129,288.89 is: 178,420.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,257.77 : 319,138.10 = 129,288.89 : x
  2. Step 2: Convert to fraction form
    231,257.77/319,138.10 = 129,288.89/x
  3. Step 3: Cross multiply
    231,257.77x = 319,138.10 × 129,288.89
  4. Step 4: Simplify right side
    231,257.77x = 41,261,011,341.94
  5. Step 5: Solve for x
    x = 41,261,011,341.94/231,257.77
  6. Step 6: Final answer
    x = 178,420.00

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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.