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Finding the Fourth Proportional to 251,978.38, 347,730.18 and 138,801.16

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Solution

The fourth proportional to 251,978.38, 347,730.18 and 138,801.16 is: 191,545.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,978.38 : 347,730.18 = 138,801.16 : x
  2. Step 2: Convert to fraction form
    251,978.38/347,730.18 = 138,801.16/x
  3. Step 3: Cross multiply
    251,978.38x = 347,730.18 × 138,801.16
  4. Step 4: Simplify right side
    251,978.38x = 48,265,352,351.01
  5. Step 5: Solve for x
    x = 48,265,352,351.01/251,978.38
  6. Step 6: Final answer
    x = 191,545.61

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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.