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Finding the Fourth Proportional to 100,830.80, 151,294.80 and 71,184.80

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Solution

The fourth proportional to 100,830.80, 151,294.80 and 71,184.80 is: 106,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,830.80 : 151,294.80 = 71,184.80 : x
  2. Step 2: Convert to fraction form
    100,830.80/151,294.80 = 71,184.80/x
  3. Step 3: Cross multiply
    100,830.80x = 151,294.80 × 71,184.80
  4. Step 4: Simplify right side
    100,830.80x = 10,769,890,079.04
  5. Step 5: Solve for x
    x = 10,769,890,079.04/100,830.80
  6. Step 6: Final answer
    x = 106,811.51

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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.