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Finding the Fourth Proportional to 107,954.40, 161,931.60 and 100,081.20

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Solution

The fourth proportional to 107,954.40, 161,931.60 and 100,081.20 is: 150,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,954.40 : 161,931.60 = 100,081.20 : x
  2. Step 2: Convert to fraction form
    107,954.40/161,931.60 = 100,081.20/x
  3. Step 3: Cross multiply
    107,954.40x = 161,931.60 × 100,081.20
  4. Step 4: Simplify right side
    107,954.40x = 16,206,308,845.92
  5. Step 5: Solve for x
    x = 16,206,308,845.92/107,954.40
  6. Step 6: Final answer
    x = 150,121.80

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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.