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Finding the Fourth Proportional to 66,540.40, 99,810.60 and 40,231.60

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Solution

The fourth proportional to 66,540.40, 99,810.60 and 40,231.60 is: 60,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,540.40 : 99,810.60 = 40,231.60 : x
  2. Step 2: Convert to fraction form
    66,540.40/99,810.60 = 40,231.60/x
  3. Step 3: Cross multiply
    66,540.40x = 99,810.60 × 40,231.60
  4. Step 4: Simplify right side
    66,540.40x = 4,015,540,134.96
  5. Step 5: Solve for x
    x = 4,015,540,134.96/66,540.40
  6. Step 6: Final answer
    x = 60,347.40

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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.