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Finding the Fourth Proportional to 71,722.72, 98,987.70 and 43,043.68

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Solution

The fourth proportional to 71,722.72, 98,987.70 and 43,043.68 is: 59,406.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,722.72 : 98,987.70 = 43,043.68 : x
  2. Step 2: Convert to fraction form
    71,722.72/98,987.70 = 43,043.68/x
  3. Step 3: Cross multiply
    71,722.72x = 98,987.70 × 43,043.68
  4. Step 4: Simplify right side
    71,722.72x = 4,260,794,882.74
  5. Step 5: Solve for x
    x = 4,260,794,882.74/71,722.72
  6. Step 6: Final answer
    x = 59,406.49

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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.