Home / 82,808.20-124,212.30-20,478.70

Finding the Fourth Proportional to 82,808.20, 124,212.30 and 20,478.70

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Solution

The fourth proportional to 82,808.20, 124,212.30 and 20,478.70 is: 30,718.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,808.20 : 124,212.30 = 20,478.70 : x
  2. Step 2: Convert to fraction form
    82,808.20/124,212.30 = 20,478.70/x
  3. Step 3: Cross multiply
    82,808.20x = 124,212.30 × 20,478.70
  4. Step 4: Simplify right side
    82,808.20x = 2,543,706,428.01
  5. Step 5: Solve for x
    x = 2,543,706,428.01/82,808.20
  6. Step 6: Final answer
    x = 30,718.05

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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.