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Finding the Fourth Proportional to 111,419.86, 153,770.46 and 63,680.08

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Solution

The fourth proportional to 111,419.86, 153,770.46 and 63,680.08 is: 87,884.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,419.86 : 153,770.46 = 63,680.08 : x
  2. Step 2: Convert to fraction form
    111,419.86/153,770.46 = 63,680.08/x
  3. Step 3: Cross multiply
    111,419.86x = 153,770.46 × 63,680.08
  4. Step 4: Simplify right side
    111,419.86x = 9,792,115,194.44
  5. Step 5: Solve for x
    x = 9,792,115,194.44/111,419.86
  6. Step 6: Final answer
    x = 87,884.83

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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.