Home / 81,071.24-111,821.96-74,379.02

Finding the Fourth Proportional to 81,071.24, 111,821.96 and 74,379.02

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Solution

The fourth proportional to 81,071.24, 111,821.96 and 74,379.02 is: 102,591.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,071.24 : 111,821.96 = 74,379.02 : x
  2. Step 2: Convert to fraction form
    81,071.24/111,821.96 = 74,379.02/x
  3. Step 3: Cross multiply
    81,071.24x = 111,821.96 × 74,379.02
  4. Step 4: Simplify right side
    81,071.24x = 8,317,207,799.28
  5. Step 5: Solve for x
    x = 8,317,207,799.28/81,071.24
  6. Step 6: Final answer
    x = 102,591.35

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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.