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Finding the Fourth Proportional to 109,155, 150,640.92 and 66,164.16

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Solution

The fourth proportional to 109,155, 150,640.92 and 66,164.16 is: 91,310.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,155 : 150,640.92 = 66,164.16 : x
  2. Step 2: Convert to fraction form
    109,155/150,640.92 = 66,164.16/x
  3. Step 3: Cross multiply
    109,155x = 150,640.92 × 66,164.16
  4. Step 4: Simplify right side
    109,155x = 9,967,029,933.43
  5. Step 5: Solve for x
    x = 9,967,029,933.43/109,155
  6. Step 6: Final answer
    x = 91,310.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.