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Finding the Fourth Proportional to 80,686.67, 120,948.26 and 40,584.48

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Solution

The fourth proportional to 80,686.67, 120,948.26 and 40,584.48 is: 60,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,686.67 : 120,948.26 = 40,584.48 : x
  2. Step 2: Convert to fraction form
    80,686.67/120,948.26 = 40,584.48/x
  3. Step 3: Cross multiply
    80,686.67x = 120,948.26 × 40,584.48
  4. Step 4: Simplify right side
    80,686.67x = 4,908,622,036.08
  5. Step 5: Solve for x
    x = 4,908,622,036.08/80,686.67
  6. Step 6: Final answer
    x = 60,835.60

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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.