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Finding the Fourth Proportional to 167,713.20, 251,569.80 and 78,937.20

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Solution

The fourth proportional to 167,713.20, 251,569.80 and 78,937.20 is: 118,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,713.20 : 251,569.80 = 78,937.20 : x
  2. Step 2: Convert to fraction form
    167,713.20/251,569.80 = 78,937.20/x
  3. Step 3: Cross multiply
    167,713.20x = 251,569.80 × 78,937.20
  4. Step 4: Simplify right side
    167,713.20x = 19,858,215,616.56
  5. Step 5: Solve for x
    x = 19,858,215,616.56/167,713.20
  6. Step 6: Final answer
    x = 118,405.80

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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.