Home / 82,812.20-124,218.30-69,981.80

Finding the Fourth Proportional to 82,812.20, 124,218.30 and 69,981.80

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Solution

The fourth proportional to 82,812.20, 124,218.30 and 69,981.80 is: 104,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,812.20 : 124,218.30 = 69,981.80 : x
  2. Step 2: Convert to fraction form
    82,812.20/124,218.30 = 69,981.80/x
  3. Step 3: Cross multiply
    82,812.20x = 124,218.30 × 69,981.80
  4. Step 4: Simplify right side
    82,812.20x = 8,693,020,226.94
  5. Step 5: Solve for x
    x = 8,693,020,226.94/82,812.20
  6. Step 6: Final answer
    x = 104,972.70

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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.