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Finding the Fourth Proportional to 82,726.40, 124,140.90 and 43,311.80

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Solution

The fourth proportional to 82,726.40, 124,140.90 and 43,311.80 is: 64,994.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,726.40 : 124,140.90 = 43,311.80 : x
  2. Step 2: Convert to fraction form
    82,726.40/124,140.90 = 43,311.80/x
  3. Step 3: Cross multiply
    82,726.40x = 124,140.90 × 43,311.80
  4. Step 4: Simplify right side
    82,726.40x = 5,376,765,832.62
  5. Step 5: Solve for x
    x = 5,376,765,832.62/82,726.40
  6. Step 6: Final answer
    x = 64,994.56

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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.