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Finding the Fourth Proportional to 71,862.59, 99,163.93 and 40,030.80

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Solution

The fourth proportional to 71,862.59, 99,163.93 and 40,030.80 is: 55,238.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,862.59 : 99,163.93 = 40,030.80 : x
  2. Step 2: Convert to fraction form
    71,862.59/99,163.93 = 40,030.80/x
  3. Step 3: Cross multiply
    71,862.59x = 99,163.93 × 40,030.80
  4. Step 4: Simplify right side
    71,862.59x = 3,969,611,449.04
  5. Step 5: Solve for x
    x = 3,969,611,449.04/71,862.59
  6. Step 6: Final answer
    x = 55,238.91

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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.