Home / 135,805.76-187,434.48-79,217.20

Finding the Fourth Proportional to 135,805.76, 187,434.48 and 79,217.20

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Solution

The fourth proportional to 135,805.76, 187,434.48 and 79,217.20 is: 109,332.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,805.76 : 187,434.48 = 79,217.20 : x
  2. Step 2: Convert to fraction form
    135,805.76/187,434.48 = 79,217.20/x
  3. Step 3: Cross multiply
    135,805.76x = 187,434.48 × 79,217.20
  4. Step 4: Simplify right side
    135,805.76x = 14,848,034,689.06
  5. Step 5: Solve for x
    x = 14,848,034,689.06/135,805.76
  6. Step 6: Final answer
    x = 109,332.88

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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.