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Finding the Fourth Proportional to 71,471.70, 107,172.90 and 21,542.49

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Solution

The fourth proportional to 71,471.70, 107,172.90 and 21,542.49 is: 32,303.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.70 : 107,172.90 = 21,542.49 : x
  2. Step 2: Convert to fraction form
    71,471.70/107,172.90 = 21,542.49/x
  3. Step 3: Cross multiply
    71,471.70x = 107,172.90 × 21,542.49
  4. Step 4: Simplify right side
    71,471.70x = 2,308,771,126.52
  5. Step 5: Solve for x
    x = 2,308,771,126.52/71,471.70
  6. Step 6: Final answer
    x = 32,303.29

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1.5x scale

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.