Home / 82,638.19-123,966.09-26,458.21

Finding the Fourth Proportional to 82,638.19, 123,966.09 and 26,458.21

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Solution

The fourth proportional to 82,638.19, 123,966.09 and 26,458.21 is: 39,690.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,638.19 : 123,966.09 = 26,458.21 : x
  2. Step 2: Convert to fraction form
    82,638.19/123,966.09 = 26,458.21/x
  3. Step 3: Cross multiply
    82,638.19x = 123,966.09 × 26,458.21
  4. Step 4: Simplify right side
    82,638.19x = 3,279,920,842.10
  5. Step 5: Solve for x
    x = 3,279,920,842.10/82,638.19
  6. Step 6: Final answer
    x = 39,690.13

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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.