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Finding the Fourth Proportional to 66,968.25, 100,853.40 and 60,989.55

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Solution

The fourth proportional to 66,968.25, 100,853.40 and 60,989.55 is: 91,849.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,968.25 : 100,853.40 = 60,989.55 : x
  2. Step 2: Convert to fraction form
    66,968.25/100,853.40 = 60,989.55/x
  3. Step 3: Cross multiply
    66,968.25x = 100,853.40 × 60,989.55
  4. Step 4: Simplify right side
    66,968.25x = 6,151,003,481.97
  5. Step 5: Solve for x
    x = 6,151,003,481.97/66,968.25
  6. Step 6: Final answer
    x = 91,849.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.