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Finding the Fourth Proportional to 167,978.10, 251,967.15 and 155,147.70

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Solution

The fourth proportional to 167,978.10, 251,967.15 and 155,147.70 is: 232,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,978.10 : 251,967.15 = 155,147.70 : x
  2. Step 2: Convert to fraction form
    167,978.10/251,967.15 = 155,147.70/x
  3. Step 3: Cross multiply
    167,978.10x = 251,967.15 × 155,147.70
  4. Step 4: Simplify right side
    167,978.10x = 39,092,123,798.06
  5. Step 5: Solve for x
    x = 39,092,123,798.06/167,978.10
  6. Step 6: Final answer
    x = 232,721.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.