Home / 80,640.06-120,606.36-71,817.66

Finding the Fourth Proportional to 80,640.06, 120,606.36 and 71,817.66

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Solution

The fourth proportional to 80,640.06, 120,606.36 and 71,817.66 is: 107,411.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,640.06 : 120,606.36 = 71,817.66 : x
  2. Step 2: Convert to fraction form
    80,640.06/120,606.36 = 71,817.66/x
  3. Step 3: Cross multiply
    80,640.06x = 120,606.36 × 71,817.66
  4. Step 4: Simplify right side
    80,640.06x = 8,661,666,556.32
  5. Step 5: Solve for x
    x = 8,661,666,556.32/80,640.06
  6. Step 6: Final answer
    x = 107,411.46

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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.