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Finding the Fourth Proportional to 251,521.92, 347,105.92 and 138,350.72

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Solution

The fourth proportional to 251,521.92, 347,105.92 and 138,350.72 is: 190,927.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,521.92 : 347,105.92 = 138,350.72 : x
  2. Step 2: Convert to fraction form
    251,521.92/347,105.92 = 138,350.72/x
  3. Step 3: Cross multiply
    251,521.92x = 347,105.92 × 138,350.72
  4. Step 4: Simplify right side
    251,521.92x = 48,022,353,948.26
  5. Step 5: Solve for x
    x = 48,022,353,948.26/251,521.92
  6. Step 6: Final answer
    x = 190,927.11

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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.