Home / 83,640.27-115,415.90-49,642.95

Finding the Fourth Proportional to 83,640.27, 115,415.90 and 49,642.95

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Solution

The fourth proportional to 83,640.27, 115,415.90 and 49,642.95 is: 68,502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.27 : 115,415.90 = 49,642.95 : x
  2. Step 2: Convert to fraction form
    83,640.27/115,415.90 = 49,642.95/x
  3. Step 3: Cross multiply
    83,640.27x = 115,415.90 × 49,642.95
  4. Step 4: Simplify right side
    83,640.27x = 5,729,584,927.61
  5. Step 5: Solve for x
    x = 5,729,584,927.61/83,640.27
  6. Step 6: Final answer
    x = 68,502.71

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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.