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Finding the Fourth Proportional to 65,805.20, 98,419.80 and 58,835.60

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Solution

The fourth proportional to 65,805.20, 98,419.80 and 58,835.60 is: 87,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,805.20 : 98,419.80 = 58,835.60 : x
  2. Step 2: Convert to fraction form
    65,805.20/98,419.80 = 58,835.60/x
  3. Step 3: Cross multiply
    65,805.20x = 98,419.80 × 58,835.60
  4. Step 4: Simplify right side
    65,805.20x = 5,790,587,984.88
  5. Step 5: Solve for x
    x = 5,790,587,984.88/65,805.20
  6. Step 6: Final answer
    x = 87,995.90

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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.