Home / 100,311.48-138,428.94-54,992.04

Finding the Fourth Proportional to 100,311.48, 138,428.94 and 54,992.04

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Solution

The fourth proportional to 100,311.48, 138,428.94 and 54,992.04 is: 75,888.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,311.48 : 138,428.94 = 54,992.04 : x
  2. Step 2: Convert to fraction form
    100,311.48/138,428.94 = 54,992.04/x
  3. Step 3: Cross multiply
    100,311.48x = 138,428.94 × 54,992.04
  4. Step 4: Simplify right side
    100,311.48x = 7,612,489,805.64
  5. Step 5: Solve for x
    x = 7,612,489,805.64/100,311.48
  6. Step 6: Final answer
    x = 75,888.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.