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Finding the Fourth Proportional to 269,475.10, 404,212.65 and 91,987.90

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Solution

The fourth proportional to 269,475.10, 404,212.65 and 91,987.90 is: 137,981.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,475.10 : 404,212.65 = 91,987.90 : x
  2. Step 2: Convert to fraction form
    269,475.10/404,212.65 = 91,987.90/x
  3. Step 3: Cross multiply
    269,475.10x = 404,212.65 × 91,987.90
  4. Step 4: Simplify right side
    269,475.10x = 37,182,672,826.94
  5. Step 5: Solve for x
    x = 37,182,672,826.94/269,475.10
  6. Step 6: Final answer
    x = 137,981.85

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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.