Home / 80,966.10-120,635.06-76,439

Finding the Fourth Proportional to 80,966.10, 120,635.06 and 76,439

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Solution

The fourth proportional to 80,966.10, 120,635.06 and 76,439 is: 113,889.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,966.10 : 120,635.06 = 76,439 : x
  2. Step 2: Convert to fraction form
    80,966.10/120,635.06 = 76,439/x
  3. Step 3: Cross multiply
    80,966.10x = 120,635.06 × 76,439
  4. Step 4: Simplify right side
    80,966.10x = 9,221,223,351.34
  5. Step 5: Solve for x
    x = 9,221,223,351.34/80,966.10
  6. Step 6: Final answer
    x = 113,889.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.