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Finding the Fourth Proportional to 66,988.96, 100,485.56 and 33,690.84

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Solution

The fourth proportional to 66,988.96, 100,485.56 and 33,690.84 is: 50,537.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,988.96 : 100,485.56 = 33,690.84 : x
  2. Step 2: Convert to fraction form
    66,988.96/100,485.56 = 33,690.84/x
  3. Step 3: Cross multiply
    66,988.96x = 100,485.56 × 33,690.84
  4. Step 4: Simplify right side
    66,988.96x = 3,385,442,631.68
  5. Step 5: Solve for x
    x = 3,385,442,631.68/66,988.96
  6. Step 6: Final answer
    x = 50,537.32

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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.