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Finding the Fourth Proportional to 145,776.20, 218,695 and 82,626.60

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Solution

The fourth proportional to 145,776.20, 218,695 and 82,626.60 is: 123,957.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,776.20 : 218,695 = 82,626.60 : x
  2. Step 2: Convert to fraction form
    145,776.20/218,695 = 82,626.60/x
  3. Step 3: Cross multiply
    145,776.20x = 218,695 × 82,626.60
  4. Step 4: Simplify right side
    145,776.20x = 18,070,024,287
  5. Step 5: Solve for x
    x = 18,070,024,287/145,776.20
  6. Step 6: Final answer
    x = 123,957.30

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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.