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Finding the Fourth Proportional to 82,872.20, 124,016.70 and 56,628.20

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Solution

The fourth proportional to 82,872.20, 124,016.70 and 56,628.20 is: 84,743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,872.20 : 124,016.70 = 56,628.20 : x
  2. Step 2: Convert to fraction form
    82,872.20/124,016.70 = 56,628.20/x
  3. Step 3: Cross multiply
    82,872.20x = 124,016.70 × 56,628.20
  4. Step 4: Simplify right side
    82,872.20x = 7,022,842,490.94
  5. Step 5: Solve for x
    x = 7,022,842,490.94/82,872.20
  6. Step 6: Final answer
    x = 84,743.04

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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.