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Finding the Fourth Proportional to 71,489.70, 107,235.32 and 21,570.24

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Solution

The fourth proportional to 71,489.70, 107,235.32 and 21,570.24 is: 32,355.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,489.70 : 107,235.32 = 21,570.24 : x
  2. Step 2: Convert to fraction form
    71,489.70/107,235.32 = 21,570.24/x
  3. Step 3: Cross multiply
    71,489.70x = 107,235.32 × 21,570.24
  4. Step 4: Simplify right side
    71,489.70x = 2,313,091,588.88
  5. Step 5: Solve for x
    x = 2,313,091,588.88/71,489.70
  6. Step 6: Final answer
    x = 32,355.59

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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.