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Finding the Fourth Proportional to 111,306.72, 153,619.02 and 68,878.92

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Solution

The fourth proportional to 111,306.72, 153,619.02 and 68,878.92 is: 95,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,306.72 : 153,619.02 = 68,878.92 : x
  2. Step 2: Convert to fraction form
    111,306.72/153,619.02 = 68,878.92/x
  3. Step 3: Cross multiply
    111,306.72x = 153,619.02 × 68,878.92
  4. Step 4: Simplify right side
    111,306.72x = 10,581,112,189.06
  5. Step 5: Solve for x
    x = 10,581,112,189.06/111,306.72
  6. Step 6: Final answer
    x = 95,062.65

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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.