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Finding the Fourth Proportional to 71,500.50, 107,215.92 and 21,571.20

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Solution

The fourth proportional to 71,500.50, 107,215.92 and 21,571.20 is: 32,346.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,500.50 : 107,215.92 = 21,571.20 : x
  2. Step 2: Convert to fraction form
    71,500.50/107,215.92 = 21,571.20/x
  3. Step 3: Cross multiply
    71,500.50x = 107,215.92 × 21,571.20
  4. Step 4: Simplify right side
    71,500.50x = 2,312,776,053.50
  5. Step 5: Solve for x
    x = 2,312,776,053.50/71,500.50
  6. Step 6: Final answer
    x = 32,346.29

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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.