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Finding the Fourth Proportional to 51,487.40, 77,231.10 and 21,906.20

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Solution

The fourth proportional to 51,487.40, 77,231.10 and 21,906.20 is: 32,859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,487.40 : 77,231.10 = 21,906.20 : x
  2. Step 2: Convert to fraction form
    51,487.40/77,231.10 = 21,906.20/x
  3. Step 3: Cross multiply
    51,487.40x = 77,231.10 × 21,906.20
  4. Step 4: Simplify right side
    51,487.40x = 1,691,839,922.82
  5. Step 5: Solve for x
    x = 1,691,839,922.82/51,487.40
  6. Step 6: Final answer
    x = 32,859.30

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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.