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Finding the Fourth Proportional to 113,379.80, 169,923.90 and 68,959.40

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Solution

The fourth proportional to 113,379.80, 169,923.90 and 68,959.40 is: 103,350.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,379.80 : 169,923.90 = 68,959.40 : x
  2. Step 2: Convert to fraction form
    113,379.80/169,923.90 = 68,959.40/x
  3. Step 3: Cross multiply
    113,379.80x = 169,923.90 × 68,959.40
  4. Step 4: Simplify right side
    113,379.80x = 11,717,850,189.66
  5. Step 5: Solve for x
    x = 11,717,850,189.66/113,379.80
  6. Step 6: Final answer
    x = 103,350.42

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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.