Home / 80,702.25-121,053.98-28,111.65

Finding the Fourth Proportional to 80,702.25, 121,053.98 and 28,111.65

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Solution

The fourth proportional to 80,702.25, 121,053.98 and 28,111.65 is: 42,167.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,702.25 : 121,053.98 = 28,111.65 : x
  2. Step 2: Convert to fraction form
    80,702.25/121,053.98 = 28,111.65/x
  3. Step 3: Cross multiply
    80,702.25x = 121,053.98 × 28,111.65
  4. Step 4: Simplify right side
    80,702.25x = 3,403,027,116.87
  5. Step 5: Solve for x
    x = 3,403,027,116.87/80,702.25
  6. Step 6: Final answer
    x = 42,167.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.