Home / 80,707.25-121,061.48-28,116.65

Finding the Fourth Proportional to 80,707.25, 121,061.48 and 28,116.65

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Solution

The fourth proportional to 80,707.25, 121,061.48 and 28,116.65 is: 42,175.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,707.25 : 121,061.48 = 28,116.65 : x
  2. Step 2: Convert to fraction form
    80,707.25/121,061.48 = 28,116.65/x
  3. Step 3: Cross multiply
    80,707.25x = 121,061.48 × 28,116.65
  4. Step 4: Simplify right side
    80,707.25x = 3,403,843,261.64
  5. Step 5: Solve for x
    x = 3,403,843,261.64/80,707.25
  6. Step 6: Final answer
    x = 42,175.19

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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.