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Finding the Fourth Proportional to 251,915.10, 347,627.05 and 138,737.85

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Solution

The fourth proportional to 251,915.10, 347,627.05 and 138,737.85 is: 191,449.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,915.10 : 347,627.05 = 138,737.85 : x
  2. Step 2: Convert to fraction form
    251,915.10/347,627.05 = 138,737.85/x
  3. Step 3: Cross multiply
    251,915.10x = 347,627.05 × 138,737.85
  4. Step 4: Simplify right side
    251,915.10x = 48,229,029,518.84
  5. Step 5: Solve for x
    x = 48,229,029,518.84/251,915.10
  6. Step 6: Final answer
    x = 191,449.54

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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.