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Finding the Fourth Proportional to 65,736.60, 98,459.10 and 54,072.60

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Solution

The fourth proportional to 65,736.60, 98,459.10 and 54,072.60 is: 80,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,736.60 : 98,459.10 = 54,072.60 : x
  2. Step 2: Convert to fraction form
    65,736.60/98,459.10 = 54,072.60/x
  3. Step 3: Cross multiply
    65,736.60x = 98,459.10 × 54,072.60
  4. Step 4: Simplify right side
    65,736.60x = 5,323,939,530.66
  5. Step 5: Solve for x
    x = 5,323,939,530.66/65,736.60
  6. Step 6: Final answer
    x = 80,988.97

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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.