Home / 231,490.11-319,443.30-128,118.66

Finding the Fourth Proportional to 231,490.11, 319,443.30 and 128,118.66

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Solution

The fourth proportional to 231,490.11, 319,443.30 and 128,118.66 is: 176,796.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,490.11 : 319,443.30 = 128,118.66 : x
  2. Step 2: Convert to fraction form
    231,490.11/319,443.30 = 128,118.66/x
  3. Step 3: Cross multiply
    231,490.11x = 319,443.30 × 128,118.66
  4. Step 4: Simplify right side
    231,490.11x = 40,926,647,541.98
  5. Step 5: Solve for x
    x = 40,926,647,541.98/231,490.11
  6. Step 6: Final answer
    x = 176,796.53

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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.