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Finding the Fourth Proportional to 111,781.74, 154,180.69 and 75,909.48

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Solution

The fourth proportional to 111,781.74, 154,180.69 and 75,909.48 is: 104,702.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,781.74 : 154,180.69 = 75,909.48 : x
  2. Step 2: Convert to fraction form
    111,781.74/154,180.69 = 75,909.48/x
  3. Step 3: Cross multiply
    111,781.74x = 154,180.69 × 75,909.48
  4. Step 4: Simplify right side
    111,781.74x = 11,703,776,003.94
  5. Step 5: Solve for x
    x = 11,703,776,003.94/111,781.74
  6. Step 6: Final answer
    x = 104,702.04

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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.