Home / 80,821.57-121,224.88-38,117.21

Finding the Fourth Proportional to 80,821.57, 121,224.88 and 38,117.21

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Solution

The fourth proportional to 80,821.57, 121,224.88 and 38,117.21 is: 57,172.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,821.57 : 121,224.88 = 38,117.21 : x
  2. Step 2: Convert to fraction form
    80,821.57/121,224.88 = 38,117.21/x
  3. Step 3: Cross multiply
    80,821.57x = 121,224.88 × 38,117.21
  4. Step 4: Simplify right side
    80,821.57x = 4,620,753,883.45
  5. Step 5: Solve for x
    x = 4,620,753,883.45/80,821.57
  6. Step 6: Final answer
    x = 57,172.28

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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.