Home / 82,386.94-123,285.14-71,331.78

Finding the Fourth Proportional to 82,386.94, 123,285.14 and 71,331.78

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Solution

The fourth proportional to 82,386.94, 123,285.14 and 71,331.78 is: 106,742.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,386.94 : 123,285.14 = 71,331.78 : x
  2. Step 2: Convert to fraction form
    82,386.94/123,285.14 = 71,331.78/x
  3. Step 3: Cross multiply
    82,386.94x = 123,285.14 × 71,331.78
  4. Step 4: Simplify right side
    82,386.94x = 8,794,148,483.75
  5. Step 5: Solve for x
    x = 8,794,148,483.75/82,386.94
  6. Step 6: Final answer
    x = 106,742.02

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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.