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Finding the Fourth Proportional to 101,278.44, 151,871.49 and 42,078.78

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Solution

The fourth proportional to 101,278.44, 151,871.49 and 42,078.78 is: 63,098.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,278.44 : 151,871.49 = 42,078.78 : x
  2. Step 2: Convert to fraction form
    101,278.44/151,871.49 = 42,078.78/x
  3. Step 3: Cross multiply
    101,278.44x = 151,871.49 × 42,078.78
  4. Step 4: Simplify right side
    101,278.44x = 6,390,567,015.98
  5. Step 5: Solve for x
    x = 6,390,567,015.98/101,278.44
  6. Step 6: Final answer
    x = 63,098.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.