Home / 81,400.40-122,082.12-28,809.86

Finding the Fourth Proportional to 81,400.40, 122,082.12 and 28,809.86

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Solution

The fourth proportional to 81,400.40, 122,082.12 and 28,809.86 is: 43,208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,400.40 : 122,082.12 = 28,809.86 : x
  2. Step 2: Convert to fraction form
    81,400.40/122,082.12 = 28,809.86/x
  3. Step 3: Cross multiply
    81,400.40x = 122,082.12 × 28,809.86
  4. Step 4: Simplify right side
    81,400.40x = 3,517,168,785.70
  5. Step 5: Solve for x
    x = 3,517,168,785.70/81,400.40
  6. Step 6: Final answer
    x = 43,208.25

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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.