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Finding the Fourth Proportional to 109,478.40, 150,873.75 and 79,212.48

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Solution

The fourth proportional to 109,478.40, 150,873.75 and 79,212.48 is: 109,163.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,478.40 : 150,873.75 = 79,212.48 : x
  2. Step 2: Convert to fraction form
    109,478.40/150,873.75 = 79,212.48/x
  3. Step 3: Cross multiply
    109,478.40x = 150,873.75 × 79,212.48
  4. Step 4: Simplify right side
    109,478.40x = 11,951,083,904.40
  5. Step 5: Solve for x
    x = 11,951,083,904.40/109,478.40
  6. Step 6: Final answer
    x = 109,163.85

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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.