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Finding the Fourth Proportional to 81,400.40, 122,003.40 and 41,937.20

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Solution

The fourth proportional to 81,400.40, 122,003.40 and 41,937.20 is: 62,855.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,400.40 : 122,003.40 = 41,937.20 : x
  2. Step 2: Convert to fraction form
    81,400.40/122,003.40 = 41,937.20/x
  3. Step 3: Cross multiply
    81,400.40x = 122,003.40 × 41,937.20
  4. Step 4: Simplify right side
    81,400.40x = 5,116,480,986.48
  5. Step 5: Solve for x
    x = 5,116,480,986.48/81,400.40
  6. Step 6: Final answer
    x = 62,855.72

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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.