Home / 135,713.20-187,256.17-78,351.53

Finding the Fourth Proportional to 135,713.20, 187,256.17 and 78,351.53

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Solution

The fourth proportional to 135,713.20, 187,256.17 and 78,351.53 is: 108,108.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,713.20 : 187,256.17 = 78,351.53 : x
  2. Step 2: Convert to fraction form
    135,713.20/187,256.17 = 78,351.53/x
  3. Step 3: Cross multiply
    135,713.20x = 187,256.17 × 78,351.53
  4. Step 4: Simplify right side
    135,713.20x = 14,671,806,289.28
  5. Step 5: Solve for x
    x = 14,671,806,289.28/135,713.20
  6. Step 6: Final answer
    x = 108,108.91

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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.