Home / 135,988.20-187,652.75-78,631.20

Finding the Fourth Proportional to 135,988.20, 187,652.75 and 78,631.20

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Solution

The fourth proportional to 135,988.20, 187,652.75 and 78,631.20 is: 108,504.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,988.20 : 187,652.75 = 78,631.20 : x
  2. Step 2: Convert to fraction form
    135,988.20/187,652.75 = 78,631.20/x
  3. Step 3: Cross multiply
    135,988.20x = 187,652.75 × 78,631.20
  4. Step 4: Simplify right side
    135,988.20x = 14,755,360,522.64
  5. Step 5: Solve for x
    x = 14,755,360,522.64/135,988.20
  6. Step 6: Final answer
    x = 108,504.71

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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.