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Finding the Fourth Proportional to 81,202.85, 112,062.49 and 45,392.70

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Solution

The fourth proportional to 81,202.85, 112,062.49 and 45,392.70 is: 62,643.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,202.85 : 112,062.49 = 45,392.70 : x
  2. Step 2: Convert to fraction form
    81,202.85/112,062.49 = 45,392.70/x
  3. Step 3: Cross multiply
    81,202.85x = 112,062.49 × 45,392.70
  4. Step 4: Simplify right side
    81,202.85x = 5,086,819,296.58
  5. Step 5: Solve for x
    x = 5,086,819,296.58/81,202.85
  6. Step 6: Final answer
    x = 62,643.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.