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Finding the Fourth Proportional to 84,886, 126,432.34 and 80,445.04

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Solution

The fourth proportional to 84,886, 126,432.34 and 80,445.04 is: 119,817.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,886 : 126,432.34 = 80,445.04 : x
  2. Step 2: Convert to fraction form
    84,886/126,432.34 = 80,445.04/x
  3. Step 3: Cross multiply
    84,886x = 126,432.34 × 80,445.04
  4. Step 4: Simplify right side
    84,886x = 10,170,854,648.59
  5. Step 5: Solve for x
    x = 10,170,854,648.59/84,886
  6. Step 6: Final answer
    x = 119,817.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.