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Finding the Fourth Proportional to 100,443.20, 150,494.48 and 66,685.60

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Solution

The fourth proportional to 100,443.20, 150,494.48 and 66,685.60 is: 99,915.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,443.20 : 150,494.48 = 66,685.60 : x
  2. Step 2: Convert to fraction form
    100,443.20/150,494.48 = 66,685.60/x
  3. Step 3: Cross multiply
    100,443.20x = 150,494.48 × 66,685.60
  4. Step 4: Simplify right side
    100,443.20x = 10,035,814,695.49
  5. Step 5: Solve for x
    x = 10,035,814,695.49/100,443.20
  6. Step 6: Final answer
    x = 99,915.32

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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.