Home / 135,989.20-187,654.12-78,632.20

Finding the Fourth Proportional to 135,989.20, 187,654.12 and 78,632.20

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Solution

The fourth proportional to 135,989.20, 187,654.12 and 78,632.20 is: 108,506.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,989.20 : 187,654.12 = 78,632.20 : x
  2. Step 2: Convert to fraction form
    135,989.20/187,654.12 = 78,632.20/x
  3. Step 3: Cross multiply
    135,989.20x = 187,654.12 × 78,632.20
  4. Step 4: Simplify right side
    135,989.20x = 14,755,656,294.66
  5. Step 5: Solve for x
    x = 14,755,656,294.66/135,989.20
  6. Step 6: Final answer
    x = 108,506.09

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1.5x scale

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.