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Finding the Fourth Proportional to 64,626.72, 96,939.88 and 20,253.64

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Solution

The fourth proportional to 64,626.72, 96,939.88 and 20,253.64 is: 30,380.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,626.72 : 96,939.88 = 20,253.64 : x
  2. Step 2: Convert to fraction form
    64,626.72/96,939.88 = 20,253.64/x
  3. Step 3: Cross multiply
    64,626.72x = 96,939.88 × 20,253.64
  4. Step 4: Simplify right side
    64,626.72x = 1,963,385,431.16
  5. Step 5: Solve for x
    x = 1,963,385,431.16/64,626.72
  6. Step 6: Final answer
    x = 30,380.40

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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.