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Finding the Fourth Proportional to 81,126.50, 111,881.84 and 67,559.46

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Solution

The fourth proportional to 81,126.50, 111,881.84 and 67,559.46 is: 93,171.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,126.50 : 111,881.84 = 67,559.46 : x
  2. Step 2: Convert to fraction form
    81,126.50/111,881.84 = 67,559.46/x
  3. Step 3: Cross multiply
    81,126.50x = 111,881.84 × 67,559.46
  4. Step 4: Simplify right side
    81,126.50x = 7,558,676,566.19
  5. Step 5: Solve for x
    x = 7,558,676,566.19/81,126.50
  6. Step 6: Final answer
    x = 93,171.49

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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.