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Finding the Fourth Proportional to 84,015.82, 126,023.73 and 69,165.18

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Solution

The fourth proportional to 84,015.82, 126,023.73 and 69,165.18 is: 103,747.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,015.82 : 126,023.73 = 69,165.18 : x
  2. Step 2: Convert to fraction form
    84,015.82/126,023.73 = 69,165.18/x
  3. Step 3: Cross multiply
    84,015.82x = 126,023.73 × 69,165.18
  4. Step 4: Simplify right side
    84,015.82x = 8,716,453,969.72
  5. Step 5: Solve for x
    x = 8,716,453,969.72/84,015.82
  6. Step 6: Final answer
    x = 103,747.77

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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.