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Finding the Fourth Proportional to 64,761.36, 97,149 and 20,389.44

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Solution

The fourth proportional to 64,761.36, 97,149 and 20,389.44 is: 30,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,761.36 : 97,149 = 20,389.44 : x
  2. Step 2: Convert to fraction form
    64,761.36/97,149 = 20,389.44/x
  3. Step 3: Cross multiply
    64,761.36x = 97,149 × 20,389.44
  4. Step 4: Simplify right side
    64,761.36x = 1,980,813,706.56
  5. Step 5: Solve for x
    x = 1,980,813,706.56/64,761.36
  6. Step 6: Final answer
    x = 30,586.35

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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.