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Finding the Fourth Proportional to 63,360, 87,436.80 and 36,864

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Solution

The fourth proportional to 63,360, 87,436.80 and 36,864 is: 50,872.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,360 : 87,436.80 = 36,864 : x
  2. Step 2: Convert to fraction form
    63,360/87,436.80 = 36,864/x
  3. Step 3: Cross multiply
    63,360x = 87,436.80 × 36,864
  4. Step 4: Simplify right side
    63,360x = 3,223,270,195.20
  5. Step 5: Solve for x
    x = 3,223,270,195.20/63,360
  6. Step 6: Final answer
    x = 50,872.32

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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.