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Finding the Fourth Proportional to 251,610.30, 347,214.60 and 138,432.78

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Solution

The fourth proportional to 251,610.30, 347,214.60 and 138,432.78 is: 191,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,610.30 : 347,214.60 = 138,432.78 : x
  2. Step 2: Convert to fraction form
    251,610.30/347,214.60 = 138,432.78/x
  3. Step 3: Cross multiply
    251,610.30x = 347,214.60 × 138,432.78
  4. Step 4: Simplify right side
    251,610.30x = 48,065,882,334.59
  5. Step 5: Solve for x
    x = 48,065,882,334.59/251,610.30
  6. Step 6: Final answer
    x = 191,033.05

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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.