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Finding the Fourth Proportional to 61,101.08, 91,665.92 and 18,978.96

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Solution

The fourth proportional to 61,101.08, 91,665.92 and 18,978.96 is: 28,472.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,101.08 : 91,665.92 = 18,978.96 : x
  2. Step 2: Convert to fraction form
    61,101.08/91,665.92 = 18,978.96/x
  3. Step 3: Cross multiply
    61,101.08x = 91,665.92 × 18,978.96
  4. Step 4: Simplify right side
    61,101.08x = 1,739,723,829.04
  5. Step 5: Solve for x
    x = 1,739,723,829.04/61,101.08
  6. Step 6: Final answer
    x = 28,472.88

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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.