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Finding the Fourth Proportional to 71,323.70, 106,995.96 and 21,407.74

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Solution

The fourth proportional to 71,323.70, 106,995.96 and 21,407.74 is: 32,114.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,323.70 : 106,995.96 = 21,407.74 : x
  2. Step 2: Convert to fraction form
    71,323.70/106,995.96 = 21,407.74/x
  3. Step 3: Cross multiply
    71,323.70x = 106,995.96 × 21,407.74
  4. Step 4: Simplify right side
    71,323.70x = 2,290,541,425.24
  5. Step 5: Solve for x
    x = 2,290,541,425.24/71,323.70
  6. Step 6: Final answer
    x = 32,114.73

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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.