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Finding the Fourth Proportional to 66,690.33, 99,971.70 and 33,376.85

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Solution

The fourth proportional to 66,690.33, 99,971.70 and 33,376.85 is: 50,033.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,690.33 : 99,971.70 = 33,376.85 : x
  2. Step 2: Convert to fraction form
    66,690.33/99,971.70 = 33,376.85/x
  3. Step 3: Cross multiply
    66,690.33x = 99,971.70 × 33,376.85
  4. Step 4: Simplify right side
    66,690.33x = 3,336,740,435.15
  5. Step 5: Solve for x
    x = 3,336,740,435.15/66,690.33
  6. Step 6: Final answer
    x = 50,033.35

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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.