Home / 80,718.17-121,077.97-28,127.57

Finding the Fourth Proportional to 80,718.17, 121,077.97 and 28,127.57

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Solution

The fourth proportional to 80,718.17, 121,077.97 and 28,127.57 is: 42,191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,718.17 : 121,077.97 = 28,127.57 : x
  2. Step 2: Convert to fraction form
    80,718.17/121,077.97 = 28,127.57/x
  3. Step 3: Cross multiply
    80,718.17x = 121,077.97 × 28,127.57
  4. Step 4: Simplify right side
    80,718.17x = 3,405,628,400.92
  5. Step 5: Solve for x
    x = 3,405,628,400.92/80,718.17
  6. Step 6: Final answer
    x = 42,191.60

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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.