Home / 102,261.20-153,187.56-81,236.72

Finding the Fourth Proportional to 102,261.20, 153,187.56 and 81,236.72

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Solution

The fourth proportional to 102,261.20, 153,187.56 and 81,236.72 is: 121,692.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,261.20 : 153,187.56 = 81,236.72 : x
  2. Step 2: Convert to fraction form
    102,261.20/153,187.56 = 81,236.72/x
  3. Step 3: Cross multiply
    102,261.20x = 153,187.56 × 81,236.72
  4. Step 4: Simplify right side
    102,261.20x = 12,444,454,919.20
  5. Step 5: Solve for x
    x = 12,444,454,919.20/102,261.20
  6. Step 6: Final answer
    x = 121,692.83

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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.