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Finding the Fourth Proportional to 63,728.72, 87,936 and 36,865.92

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Solution

The fourth proportional to 63,728.72, 87,936 and 36,865.92 is: 50,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,728.72 : 87,936 = 36,865.92 : x
  2. Step 2: Convert to fraction form
    63,728.72/87,936 = 36,865.92/x
  3. Step 3: Cross multiply
    63,728.72x = 87,936 × 36,865.92
  4. Step 4: Simplify right side
    63,728.72x = 3,241,841,541.12
  5. Step 5: Solve for x
    x = 3,241,841,541.12/63,728.72
  6. Step 6: Final answer
    x = 50,869.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.