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Finding the Fourth Proportional to 71,817.28, 107,742.08 and 21,901.76

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Solution

The fourth proportional to 71,817.28, 107,742.08 and 21,901.76 is: 32,857.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,817.28 : 107,742.08 = 21,901.76 : x
  2. Step 2: Convert to fraction form
    71,817.28/107,742.08 = 21,901.76/x
  3. Step 3: Cross multiply
    71,817.28x = 107,742.08 × 21,901.76
  4. Step 4: Simplify right side
    71,817.28x = 2,359,741,178.06
  5. Step 5: Solve for x
    x = 2,359,741,178.06/71,817.28
  6. Step 6: Final answer
    x = 32,857.57

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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.