Home / 82,182.28-122,678.90-72,217.78

Finding the Fourth Proportional to 82,182.28, 122,678.90 and 72,217.78

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Solution

The fourth proportional to 82,182.28, 122,678.90 and 72,217.78 is: 107,804.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,182.28 : 122,678.90 = 72,217.78 : x
  2. Step 2: Convert to fraction form
    82,182.28/122,678.90 = 72,217.78/x
  3. Step 3: Cross multiply
    82,182.28x = 122,678.90 × 72,217.78
  4. Step 4: Simplify right side
    82,182.28x = 8,859,597,810.84
  5. Step 5: Solve for x
    x = 8,859,597,810.84/82,182.28
  6. Step 6: Final answer
    x = 107,804.23

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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.