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Finding the Fourth Proportional to 172,306.60, 237,748.22 and 100,672.78

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Solution

The fourth proportional to 172,306.60, 237,748.22 and 100,672.78 is: 138,908.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,306.60 : 237,748.22 = 100,672.78 : x
  2. Step 2: Convert to fraction form
    172,306.60/237,748.22 = 100,672.78/x
  3. Step 3: Cross multiply
    172,306.60x = 237,748.22 × 100,672.78
  4. Step 4: Simplify right side
    172,306.60x = 23,934,774,247.45
  5. Step 5: Solve for x
    x = 23,934,774,247.45/172,306.60
  6. Step 6: Final answer
    x = 138,908.05

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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.