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Finding the Fourth Proportional to 66,087.20, 98,839.20 and 55,589.60

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Solution

The fourth proportional to 66,087.20, 98,839.20 and 55,589.60 is: 83,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,087.20 : 98,839.20 = 55,589.60 : x
  2. Step 2: Convert to fraction form
    66,087.20/98,839.20 = 55,589.60/x
  3. Step 3: Cross multiply
    66,087.20x = 98,839.20 × 55,589.60
  4. Step 4: Simplify right side
    66,087.20x = 5,494,431,592.32
  5. Step 5: Solve for x
    x = 5,494,431,592.32/66,087.20
  6. Step 6: Final answer
    x = 83,139.12

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1.5x scale

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.