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Finding the Fourth Proportional to 71,471.16, 107,213.76 and 18,881.10

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Solution

The fourth proportional to 71,471.16, 107,213.76 and 18,881.10 is: 28,323.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.16 : 107,213.76 = 18,881.10 : x
  2. Step 2: Convert to fraction form
    71,471.16/107,213.76 = 18,881.10/x
  3. Step 3: Cross multiply
    71,471.16x = 107,213.76 × 18,881.10
  4. Step 4: Simplify right side
    71,471.16x = 2,024,313,723.94
  5. Step 5: Solve for x
    x = 2,024,313,723.94/71,471.16
  6. Step 6: Final answer
    x = 28,323.50

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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.