Home / 80,639.28-120,754.80-43,061.76

Finding the Fourth Proportional to 80,639.28, 120,754.80 and 43,061.76

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Solution

The fourth proportional to 80,639.28, 120,754.80 and 43,061.76 is: 64,483.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,639.28 : 120,754.80 = 43,061.76 : x
  2. Step 2: Convert to fraction form
    80,639.28/120,754.80 = 43,061.76/x
  3. Step 3: Cross multiply
    80,639.28x = 120,754.80 × 43,061.76
  4. Step 4: Simplify right side
    80,639.28x = 5,199,914,216.45
  5. Step 5: Solve for x
    x = 5,199,914,216.45/80,639.28
  6. Step 6: Final answer
    x = 64,483.64

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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.