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Finding the Fourth Proportional to 100,110.31, 150,007.40 and 81,298.81

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Solution

The fourth proportional to 100,110.31, 150,007.40 and 81,298.81 is: 121,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,110.31 : 150,007.40 = 81,298.81 : x
  2. Step 2: Convert to fraction form
    100,110.31/150,007.40 = 81,298.81/x
  3. Step 3: Cross multiply
    100,110.31x = 150,007.40 × 81,298.81
  4. Step 4: Simplify right side
    100,110.31x = 12,195,422,704.70
  5. Step 5: Solve for x
    x = 12,195,422,704.70/100,110.31
  6. Step 6: Final answer
    x = 121,819.85

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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.