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Finding the Fourth Proportional to 142,906.68, 197,219.09 and 79,243.11

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Solution

The fourth proportional to 142,906.68, 197,219.09 and 79,243.11 is: 109,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,906.68 : 197,219.09 = 79,243.11 : x
  2. Step 2: Convert to fraction form
    142,906.68/197,219.09 = 79,243.11/x
  3. Step 3: Cross multiply
    142,906.68x = 197,219.09 × 79,243.11
  4. Step 4: Simplify right side
    142,906.68x = 15,628,253,646.75
  5. Step 5: Solve for x
    x = 15,628,253,646.75/142,906.68
  6. Step 6: Final answer
    x = 109,359.85

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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.