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Finding the Fourth Proportional to 63,072, 87,039.36 and 34,778.28

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Solution

The fourth proportional to 63,072, 87,039.36 and 34,778.28 is: 47,994.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,072 : 87,039.36 = 34,778.28 : x
  2. Step 2: Convert to fraction form
    63,072/87,039.36 = 34,778.28/x
  3. Step 3: Cross multiply
    63,072x = 87,039.36 × 34,778.28
  4. Step 4: Simplify right side
    63,072x = 3,027,079,233.10
  5. Step 5: Solve for x
    x = 3,027,079,233.10/63,072
  6. Step 6: Final answer
    x = 47,994.03

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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.