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Finding the Fourth Proportional to 63,138.57, 87,138.90 and 36,281.00

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Solution

The fourth proportional to 63,138.57, 87,138.90 and 36,281.00 is: 50,072.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,138.57 : 87,138.90 = 36,281.00 : x
  2. Step 2: Convert to fraction form
    63,138.57/87,138.90 = 36,281.00/x
  3. Step 3: Cross multiply
    63,138.57x = 87,138.90 × 36,281.00
  4. Step 4: Simplify right side
    63,138.57x = 3,161,485,995.21
  5. Step 5: Solve for x
    x = 3,161,485,995.21/63,138.57
  6. Step 6: Final answer
    x = 50,072.18

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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.