Home / 80,686.64-121,033.20-28,101.44

Finding the Fourth Proportional to 80,686.64, 121,033.20 and 28,101.44

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Solution

The fourth proportional to 80,686.64, 121,033.20 and 28,101.44 is: 42,153.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,686.64 : 121,033.20 = 28,101.44 : x
  2. Step 2: Convert to fraction form
    80,686.64/121,033.20 = 28,101.44/x
  3. Step 3: Cross multiply
    80,686.64x = 121,033.20 × 28,101.44
  4. Step 4: Simplify right side
    80,686.64x = 3,401,207,207.81
  5. Step 5: Solve for x
    x = 3,401,207,207.81/80,686.64
  6. Step 6: Final answer
    x = 42,153.29

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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.