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Finding the Fourth Proportional to 82,885.20, 124,327.80 and 69,763.20

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Solution

The fourth proportional to 82,885.20, 124,327.80 and 69,763.20 is: 104,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,885.20 : 124,327.80 = 69,763.20 : x
  2. Step 2: Convert to fraction form
    82,885.20/124,327.80 = 69,763.20/x
  3. Step 3: Cross multiply
    82,885.20x = 124,327.80 × 69,763.20
  4. Step 4: Simplify right side
    82,885.20x = 8,673,505,176.96
  5. Step 5: Solve for x
    x = 8,673,505,176.96/82,885.20
  6. Step 6: Final answer
    x = 104,644.80

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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.