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Finding the Fourth Proportional to 101,098.80, 151,667.64 and 30,978.72

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Solution

The fourth proportional to 101,098.80, 151,667.64 and 30,978.72 is: 46,474.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,098.80 : 151,667.64 = 30,978.72 : x
  2. Step 2: Convert to fraction form
    101,098.80/151,667.64 = 30,978.72/x
  3. Step 3: Cross multiply
    101,098.80x = 151,667.64 × 30,978.72
  4. Step 4: Simplify right side
    101,098.80x = 4,698,469,352.62
  5. Step 5: Solve for x
    x = 4,698,469,352.62/101,098.80
  6. Step 6: Final answer
    x = 46,474.04

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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.