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Finding the Fourth Proportional to 71,998.60, 107,984.04 and 19,394.86

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Solution

The fourth proportional to 71,998.60, 107,984.04 and 19,394.86 is: 29,088.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,998.60 : 107,984.04 = 19,394.86 : x
  2. Step 2: Convert to fraction form
    71,998.60/107,984.04 = 19,394.86/x
  3. Step 3: Cross multiply
    71,998.60x = 107,984.04 × 19,394.86
  4. Step 4: Simplify right side
    71,998.60x = 2,094,335,338.03
  5. Step 5: Solve for x
    x = 2,094,335,338.03/71,998.60
  6. Step 6: Final answer
    x = 29,088.56

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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.