Home / 135,701.52-187,264.49-78,338.90

Finding the Fourth Proportional to 135,701.52, 187,264.49 and 78,338.90

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Solution

The fourth proportional to 135,701.52, 187,264.49 and 78,338.90 is: 108,105.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,701.52 : 187,264.49 = 78,338.90 : x
  2. Step 2: Convert to fraction form
    135,701.52/187,264.49 = 78,338.90/x
  3. Step 3: Cross multiply
    135,701.52x = 187,264.49 × 78,338.90
  4. Step 4: Simplify right side
    135,701.52x = 14,670,094,232.13
  5. Step 5: Solve for x
    x = 14,670,094,232.13/135,701.52
  6. Step 6: Final answer
    x = 108,105.60

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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.