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Finding the Fourth Proportional to 65,909.52, 98,863.44 and 15,990

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Solution

The fourth proportional to 65,909.52, 98,863.44 and 15,990 is: 23,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,909.52 : 98,863.44 = 15,990 : x
  2. Step 2: Convert to fraction form
    65,909.52/98,863.44 = 15,990/x
  3. Step 3: Cross multiply
    65,909.52x = 98,863.44 × 15,990
  4. Step 4: Simplify right side
    65,909.52x = 1,580,826,405.60
  5. Step 5: Solve for x
    x = 1,580,826,405.60/65,909.52
  6. Step 6: Final answer
    x = 23,984.80

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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.