Home / 80,988.97-121,484.27-28,399.72

Finding the Fourth Proportional to 80,988.97, 121,484.27 and 28,399.72

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Solution

The fourth proportional to 80,988.97, 121,484.27 and 28,399.72 is: 42,599.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,988.97 : 121,484.27 = 28,399.72 : x
  2. Step 2: Convert to fraction form
    80,988.97/121,484.27 = 28,399.72/x
  3. Step 3: Cross multiply
    80,988.97x = 121,484.27 × 28,399.72
  4. Step 4: Simplify right side
    80,988.97x = 3,450,119,252.40
  5. Step 5: Solve for x
    x = 3,450,119,252.40/80,988.97
  6. Step 6: Final answer
    x = 42,599.87

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1.5x scale

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.