Home / 90,067.72-124,299.89-49,780.61

Finding the Fourth Proportional to 90,067.72, 124,299.89 and 49,780.61

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Solution

The fourth proportional to 90,067.72, 124,299.89 and 49,780.61 is: 68,700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,067.72 : 124,299.89 = 49,780.61 : x
  2. Step 2: Convert to fraction form
    90,067.72/124,299.89 = 49,780.61/x
  3. Step 3: Cross multiply
    90,067.72x = 124,299.89 × 49,780.61
  4. Step 4: Simplify right side
    90,067.72x = 6,187,724,347.13
  5. Step 5: Solve for x
    x = 6,187,724,347.13/90,067.72
  6. Step 6: Final answer
    x = 68,700.80

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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.