Home / 208,418.10-287,631.36-126,778.20

Finding the Fourth Proportional to 208,418.10, 287,631.36 and 126,778.20

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Solution

The fourth proportional to 208,418.10, 287,631.36 and 126,778.20 is: 174,962.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,418.10 : 287,631.36 = 126,778.20 : x
  2. Step 2: Convert to fraction form
    208,418.10/287,631.36 = 126,778.20/x
  3. Step 3: Cross multiply
    208,418.10x = 287,631.36 × 126,778.20
  4. Step 4: Simplify right side
    208,418.10x = 36,465,386,084.35
  5. Step 5: Solve for x
    x = 36,465,386,084.35/208,418.10
  6. Step 6: Final answer
    x = 174,962.66

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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.