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Finding the Fourth Proportional to 65,251.57, 97,861.36 and 20,869.13

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Solution

The fourth proportional to 65,251.57, 97,861.36 and 20,869.13 is: 31,298.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,251.57 : 97,861.36 = 20,869.13 : x
  2. Step 2: Convert to fraction form
    65,251.57/97,861.36 = 20,869.13/x
  3. Step 3: Cross multiply
    65,251.57x = 97,861.36 × 20,869.13
  4. Step 4: Simplify right side
    65,251.57x = 2,042,281,443.82
  5. Step 5: Solve for x
    x = 2,042,281,443.82/65,251.57
  6. Step 6: Final answer
    x = 31,298.58

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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.