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Finding the Fourth Proportional to 84,524.80, 126,715.84 and 53,291.20

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Solution

The fourth proportional to 84,524.80, 126,715.84 and 53,291.20 is: 79,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,524.80 : 126,715.84 = 53,291.20 : x
  2. Step 2: Convert to fraction form
    84,524.80/126,715.84 = 53,291.20/x
  3. Step 3: Cross multiply
    84,524.80x = 126,715.84 × 53,291.20
  4. Step 4: Simplify right side
    84,524.80x = 6,752,839,172.61
  5. Step 5: Solve for x
    x = 6,752,839,172.61/84,524.80
  6. Step 6: Final answer
    x = 79,891.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.