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Finding the Fourth Proportional to 100,838.40, 151,257.60 and 67,660.80

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Solution

The fourth proportional to 100,838.40, 151,257.60 and 67,660.80 is: 101,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,838.40 : 151,257.60 = 67,660.80 : x
  2. Step 2: Convert to fraction form
    100,838.40/151,257.60 = 67,660.80/x
  3. Step 3: Cross multiply
    100,838.40x = 151,257.60 × 67,660.80
  4. Step 4: Simplify right side
    100,838.40x = 10,234,210,222.08
  5. Step 5: Solve for x
    x = 10,234,210,222.08/100,838.40
  6. Step 6: Final answer
    x = 101,491.20

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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.