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Finding the Fourth Proportional to 63,740.66, 87,946.36 and 39,855.38

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Solution

The fourth proportional to 63,740.66, 87,946.36 and 39,855.38 is: 54,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,740.66 : 87,946.36 = 39,855.38 : x
  2. Step 2: Convert to fraction form
    63,740.66/87,946.36 = 39,855.38/x
  3. Step 3: Cross multiply
    63,740.66x = 87,946.36 × 39,855.38
  4. Step 4: Simplify right side
    63,740.66x = 3,505,135,058.05
  5. Step 5: Solve for x
    x = 3,505,135,058.05/63,740.66
  6. Step 6: Final answer
    x = 54,990.57

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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.