Home / 82,319.28-123,478.02-19,989.84

Finding the Fourth Proportional to 82,319.28, 123,478.02 and 19,989.84

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Solution

The fourth proportional to 82,319.28, 123,478.02 and 19,989.84 is: 29,984.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,319.28 : 123,478.02 = 19,989.84 : x
  2. Step 2: Convert to fraction form
    82,319.28/123,478.02 = 19,989.84/x
  3. Step 3: Cross multiply
    82,319.28x = 123,478.02 × 19,989.84
  4. Step 4: Simplify right side
    82,319.28x = 2,468,305,863.32
  5. Step 5: Solve for x
    x = 2,468,305,863.32/82,319.28
  6. Step 6: Final answer
    x = 29,984.54

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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.