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Finding the Fourth Proportional to 71,645.70, 107,484.07 and 21,729.63

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Solution

The fourth proportional to 71,645.70, 107,484.07 and 21,729.63 is: 32,599.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,645.70 : 107,484.07 = 21,729.63 : x
  2. Step 2: Convert to fraction form
    71,645.70/107,484.07 = 21,729.63/x
  3. Step 3: Cross multiply
    71,645.70x = 107,484.07 × 21,729.63
  4. Step 4: Simplify right side
    71,645.70x = 2,335,589,071.99
  5. Step 5: Solve for x
    x = 2,335,589,071.99/71,645.70
  6. Step 6: Final answer
    x = 32,599.15

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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.