Home / 99,221.80-136,923.78-56,789.80

Finding the Fourth Proportional to 99,221.80, 136,923.78 and 56,789.80

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Solution

The fourth proportional to 99,221.80, 136,923.78 and 56,789.80 is: 78,368.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,221.80 : 136,923.78 = 56,789.80 : x
  2. Step 2: Convert to fraction form
    99,221.80/136,923.78 = 56,789.80/x
  3. Step 3: Cross multiply
    99,221.80x = 136,923.78 × 56,789.80
  4. Step 4: Simplify right side
    99,221.80x = 7,775,874,081.44
  5. Step 5: Solve for x
    x = 7,775,874,081.44/99,221.80
  6. Step 6: Final answer
    x = 78,368.61

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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.