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Finding the Fourth Proportional to 100,388.04, 138,524.22 and 57,960.60

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Solution

The fourth proportional to 100,388.04, 138,524.22 and 57,960.60 is: 79,979.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,388.04 : 138,524.22 = 57,960.60 : x
  2. Step 2: Convert to fraction form
    100,388.04/138,524.22 = 57,960.60/x
  3. Step 3: Cross multiply
    100,388.04x = 138,524.22 × 57,960.60
  4. Step 4: Simplify right side
    100,388.04x = 8,028,946,905.73
  5. Step 5: Solve for x
    x = 8,028,946,905.73/100,388.04
  6. Step 6: Final answer
    x = 79,979.12

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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.