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Finding the Fourth Proportional to 71,857.66, 99,163.75 and 43,177.80

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Solution

The fourth proportional to 71,857.66, 99,163.75 and 43,177.80 is: 59,585.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,857.66 : 99,163.75 = 43,177.80 : x
  2. Step 2: Convert to fraction form
    71,857.66/99,163.75 = 43,177.80/x
  3. Step 3: Cross multiply
    71,857.66x = 99,163.75 × 43,177.80
  4. Step 4: Simplify right side
    71,857.66x = 4,281,672,182.68
  5. Step 5: Solve for x
    x = 4,281,672,182.68/71,857.66
  6. Step 6: Final answer
    x = 59,585.47

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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.