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Finding the Fourth Proportional to 86,043.96, 129,080.52 and 43,917.48

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Solution

The fourth proportional to 86,043.96, 129,080.52 and 43,917.48 is: 65,883.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,043.96 : 129,080.52 = 43,917.48 : x
  2. Step 2: Convert to fraction form
    86,043.96/129,080.52 = 43,917.48/x
  3. Step 3: Cross multiply
    86,043.96x = 129,080.52 × 43,917.48
  4. Step 4: Simplify right side
    86,043.96x = 5,668,891,155.49
  5. Step 5: Solve for x
    x = 5,668,891,155.49/86,043.96
  6. Step 6: Final answer
    x = 65,883.66

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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.