Home / 81,264.16-121,356.20-80,384.44

Finding the Fourth Proportional to 81,264.16, 121,356.20 and 80,384.44

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Solution

The fourth proportional to 81,264.16, 121,356.20 and 80,384.44 is: 120,042.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,264.16 : 121,356.20 = 80,384.44 : x
  2. Step 2: Convert to fraction form
    81,264.16/121,356.20 = 80,384.44/x
  3. Step 3: Cross multiply
    81,264.16x = 121,356.20 × 80,384.44
  4. Step 4: Simplify right side
    81,264.16x = 9,755,150,177.53
  5. Step 5: Solve for x
    x = 9,755,150,177.53/81,264.16
  6. Step 6: Final answer
    x = 120,042.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.