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Finding the Fourth Proportional to 85,876.74, 128,675.05 and 43,698.83

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Solution

The fourth proportional to 85,876.74, 128,675.05 and 43,698.83 is: 65,476.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,876.74 : 128,675.05 = 43,698.83 : x
  2. Step 2: Convert to fraction form
    85,876.74/128,675.05 = 43,698.83/x
  3. Step 3: Cross multiply
    85,876.74x = 128,675.05 × 43,698.83
  4. Step 4: Simplify right side
    85,876.74x = 5,622,948,382.57
  5. Step 5: Solve for x
    x = 5,622,948,382.57/85,876.74
  6. Step 6: Final answer
    x = 65,476.97

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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.