Home / 208,418.85-287,632.40-126,778.95

Finding the Fourth Proportional to 208,418.85, 287,632.40 and 126,778.95

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Solution

The fourth proportional to 208,418.85, 287,632.40 and 126,778.95 is: 174,963.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,418.85 : 287,632.40 = 126,778.95 : x
  2. Step 2: Convert to fraction form
    208,418.85/287,632.40 = 126,778.95/x
  3. Step 3: Cross multiply
    208,418.85x = 287,632.40 × 126,778.95
  4. Step 4: Simplify right side
    208,418.85x = 36,465,733,024.09
  5. Step 5: Solve for x
    x = 36,465,733,024.09/208,418.85
  6. Step 6: Final answer
    x = 174,963.70

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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.