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Finding the Fourth Proportional to 71,824.68, 99,121.86 and 43,528.68

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Solution

The fourth proportional to 71,824.68, 99,121.86 and 43,528.68 is: 60,071.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,824.68 : 99,121.86 = 43,528.68 : x
  2. Step 2: Convert to fraction form
    71,824.68/99,121.86 = 43,528.68/x
  3. Step 3: Cross multiply
    71,824.68x = 99,121.86 × 43,528.68
  4. Step 4: Simplify right side
    71,824.68x = 4,314,643,724.94
  5. Step 5: Solve for x
    x = 4,314,643,724.94/71,824.68
  6. Step 6: Final answer
    x = 60,071.88

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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.