Home / 78,943.32-108,949.18-43,138.66

Finding the Fourth Proportional to 78,943.32, 108,949.18 and 43,138.66

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Solution

The fourth proportional to 78,943.32, 108,949.18 and 43,138.66 is: 59,535.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,943.32 : 108,949.18 = 43,138.66 : x
  2. Step 2: Convert to fraction form
    78,943.32/108,949.18 = 43,138.66/x
  3. Step 3: Cross multiply
    78,943.32x = 108,949.18 × 43,138.66
  4. Step 4: Simplify right side
    78,943.32x = 4,699,921,633.30
  5. Step 5: Solve for x
    x = 4,699,921,633.30/78,943.32
  6. Step 6: Final answer
    x = 59,535.39

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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.