Home / 135,963.66-187,620.38-78,557.95

Finding the Fourth Proportional to 135,963.66, 187,620.38 and 78,557.95

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Solution

The fourth proportional to 135,963.66, 187,620.38 and 78,557.95 is: 108,404.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,963.66 : 187,620.38 = 78,557.95 : x
  2. Step 2: Convert to fraction form
    135,963.66/187,620.38 = 78,557.95/x
  3. Step 3: Cross multiply
    135,963.66x = 187,620.38 × 78,557.95
  4. Step 4: Simplify right side
    135,963.66x = 14,739,072,346.40
  5. Step 5: Solve for x
    x = 14,739,072,346.40/135,963.66
  6. Step 6: Final answer
    x = 108,404.50

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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.