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Finding the Fourth Proportional to 63,072, 87,039.96 and 34,778.64

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Solution

The fourth proportional to 63,072, 87,039.96 and 34,778.64 is: 47,994.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,072 : 87,039.96 = 34,778.64 : x
  2. Step 2: Convert to fraction form
    63,072/87,039.96 = 34,778.64/x
  3. Step 3: Cross multiply
    63,072x = 87,039.96 × 34,778.64
  4. Step 4: Simplify right side
    63,072x = 3,027,131,434.45
  5. Step 5: Solve for x
    x = 3,027,131,434.45/63,072
  6. Step 6: Final answer
    x = 47,994.85

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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.