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Finding the Fourth Proportional to 138,894.78, 191,500.59 and 113,375.22

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Solution

The fourth proportional to 138,894.78, 191,500.59 and 113,375.22 is: 156,315.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,894.78 : 191,500.59 = 113,375.22 : x
  2. Step 2: Convert to fraction form
    138,894.78/191,500.59 = 113,375.22/x
  3. Step 3: Cross multiply
    138,894.78x = 191,500.59 × 113,375.22
  4. Step 4: Simplify right side
    138,894.78x = 21,711,421,521.38
  5. Step 5: Solve for x
    x = 21,711,421,521.38/138,894.78
  6. Step 6: Final answer
    x = 156,315.60

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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.