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Finding the Fourth Proportional to 100,440.71, 150,520.22 and 72,228

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Solution

The fourth proportional to 100,440.71, 150,520.22 and 72,228 is: 108,240.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,440.71 : 150,520.22 = 72,228 : x
  2. Step 2: Convert to fraction form
    100,440.71/150,520.22 = 72,228/x
  3. Step 3: Cross multiply
    100,440.71x = 150,520.22 × 72,228
  4. Step 4: Simplify right side
    100,440.71x = 10,871,774,089.02
  5. Step 5: Solve for x
    x = 10,871,774,089.02/100,440.71
  6. Step 6: Final answer
    x = 108,240.72

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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.