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Finding the Fourth Proportional to 85,364.20, 128,046.30 and 40,968.10

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Solution

The fourth proportional to 85,364.20, 128,046.30 and 40,968.10 is: 61,452.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.20 : 128,046.30 = 40,968.10 : x
  2. Step 2: Convert to fraction form
    85,364.20/128,046.30 = 40,968.10/x
  3. Step 3: Cross multiply
    85,364.20x = 128,046.30 × 40,968.10
  4. Step 4: Simplify right side
    85,364.20x = 5,245,813,623.03
  5. Step 5: Solve for x
    x = 5,245,813,623.03/85,364.20
  6. Step 6: Final answer
    x = 61,452.15

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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.