Home / 82,110.30-123,165.45-78,829.80

Finding the Fourth Proportional to 82,110.30, 123,165.45 and 78,829.80

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Solution

The fourth proportional to 82,110.30, 123,165.45 and 78,829.80 is: 118,244.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,110.30 : 123,165.45 = 78,829.80 : x
  2. Step 2: Convert to fraction form
    82,110.30/123,165.45 = 78,829.80/x
  3. Step 3: Cross multiply
    82,110.30x = 123,165.45 × 78,829.80
  4. Step 4: Simplify right side
    82,110.30x = 9,709,107,790.41
  5. Step 5: Solve for x
    x = 9,709,107,790.41/82,110.30
  6. Step 6: Final answer
    x = 118,244.70

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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.