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Finding the Fourth Proportional to 111,559.43, 153,894.97 and 71,230.79

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Solution

The fourth proportional to 111,559.43, 153,894.97 and 71,230.79 is: 98,262.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,559.43 : 153,894.97 = 71,230.79 : x
  2. Step 2: Convert to fraction form
    111,559.43/153,894.97 = 71,230.79/x
  3. Step 3: Cross multiply
    111,559.43x = 153,894.97 × 71,230.79
  4. Step 4: Simplify right side
    111,559.43x = 10,962,060,290.13
  5. Step 5: Solve for x
    x = 10,962,060,290.13/111,559.43
  6. Step 6: Final answer
    x = 98,262.07

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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.