Home / 80,729.40-121,166.10-47,407.80

Finding the Fourth Proportional to 80,729.40, 121,166.10 and 47,407.80

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Solution

The fourth proportional to 80,729.40, 121,166.10 and 47,407.80 is: 71,153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,729.40 : 121,166.10 = 47,407.80 : x
  2. Step 2: Convert to fraction form
    80,729.40/121,166.10 = 47,407.80/x
  3. Step 3: Cross multiply
    80,729.40x = 121,166.10 × 47,407.80
  4. Step 4: Simplify right side
    80,729.40x = 5,744,218,235.58
  5. Step 5: Solve for x
    x = 5,744,218,235.58/80,729.40
  6. Step 6: Final answer
    x = 71,153.98

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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.