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Finding the Fourth Proportional to 81,854.40, 122,716.80 and 44,918.40

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Solution

The fourth proportional to 81,854.40, 122,716.80 and 44,918.40 is: 67,342.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,854.40 : 122,716.80 = 44,918.40 : x
  2. Step 2: Convert to fraction form
    81,854.40/122,716.80 = 44,918.40/x
  3. Step 3: Cross multiply
    81,854.40x = 122,716.80 × 44,918.40
  4. Step 4: Simplify right side
    81,854.40x = 5,512,242,309.12
  5. Step 5: Solve for x
    x = 5,512,242,309.12/81,854.40
  6. Step 6: Final answer
    x = 67,342.04

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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.