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Finding the Fourth Proportional to 65,992.62, 98,987.31 and 19,245.90

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Solution

The fourth proportional to 65,992.62, 98,987.31 and 19,245.90 is: 28,868.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,992.62 : 98,987.31 = 19,245.90 : x
  2. Step 2: Convert to fraction form
    65,992.62/98,987.31 = 19,245.90/x
  3. Step 3: Cross multiply
    65,992.62x = 98,987.31 × 19,245.90
  4. Step 4: Simplify right side
    65,992.62x = 1,905,099,869.53
  5. Step 5: Solve for x
    x = 1,905,099,869.53/65,992.62
  6. Step 6: Final answer
    x = 28,868.38

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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.