Home / 80,276.80-120,434.40-38,689.60

Finding the Fourth Proportional to 80,276.80, 120,434.40 and 38,689.60

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Solution

The fourth proportional to 80,276.80, 120,434.40 and 38,689.60 is: 58,043.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,276.80 : 120,434.40 = 38,689.60 : x
  2. Step 2: Convert to fraction form
    80,276.80/120,434.40 = 38,689.60/x
  3. Step 3: Cross multiply
    80,276.80x = 120,434.40 × 38,689.60
  4. Step 4: Simplify right side
    80,276.80x = 4,659,558,762.24
  5. Step 5: Solve for x
    x = 4,659,558,762.24/80,276.80
  6. Step 6: Final answer
    x = 58,043.65

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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.