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Finding the Fourth Proportional to 65,136.96, 97,719.48 and 20,158.20

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Solution

The fourth proportional to 65,136.96, 97,719.48 and 20,158.20 is: 30,241.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,136.96 : 97,719.48 = 20,158.20 : x
  2. Step 2: Convert to fraction form
    65,136.96/97,719.48 = 20,158.20/x
  3. Step 3: Cross multiply
    65,136.96x = 97,719.48 × 20,158.20
  4. Step 4: Simplify right side
    65,136.96x = 1,969,848,821.74
  5. Step 5: Solve for x
    x = 1,969,848,821.74/65,136.96
  6. Step 6: Final answer
    x = 30,241.65

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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.