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Finding the Fourth Proportional to 67,310.20, 100,965.30 and 66,435.40

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Solution

The fourth proportional to 67,310.20, 100,965.30 and 66,435.40 is: 99,653.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,310.20 : 100,965.30 = 66,435.40 : x
  2. Step 2: Convert to fraction form
    67,310.20/100,965.30 = 66,435.40/x
  3. Step 3: Cross multiply
    67,310.20x = 100,965.30 × 66,435.40
  4. Step 4: Simplify right side
    67,310.20x = 6,707,670,091.62
  5. Step 5: Solve for x
    x = 6,707,670,091.62/67,310.20
  6. Step 6: Final answer
    x = 99,653.10

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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.