Home / 154,428.30-231,642.45-138,098.70

Finding the Fourth Proportional to 154,428.30, 231,642.45 and 138,098.70

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Solution

The fourth proportional to 154,428.30, 231,642.45 and 138,098.70 is: 207,148.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,428.30 : 231,642.45 = 138,098.70 : x
  2. Step 2: Convert to fraction form
    154,428.30/231,642.45 = 138,098.70/x
  3. Step 3: Cross multiply
    154,428.30x = 231,642.45 × 138,098.70
  4. Step 4: Simplify right side
    154,428.30x = 31,989,521,209.82
  5. Step 5: Solve for x
    x = 31,989,521,209.82/154,428.30
  6. Step 6: Final answer
    x = 207,148.05

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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.