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Finding the Fourth Proportional to 82,679.40, 124,019.10 and 43,248.60

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Solution

The fourth proportional to 82,679.40, 124,019.10 and 43,248.60 is: 64,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,679.40 : 124,019.10 = 43,248.60 : x
  2. Step 2: Convert to fraction form
    82,679.40/124,019.10 = 43,248.60/x
  3. Step 3: Cross multiply
    82,679.40x = 124,019.10 × 43,248.60
  4. Step 4: Simplify right side
    82,679.40x = 5,363,652,448.26
  5. Step 5: Solve for x
    x = 5,363,652,448.26/82,679.40
  6. Step 6: Final answer
    x = 64,872.90

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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.