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Finding the Fourth Proportional to 138,808, 191,580.96 and 79,192

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Solution

The fourth proportional to 138,808, 191,580.96 and 79,192 is: 109,299.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808 : 191,580.96 = 79,192 : x
  2. Step 2: Convert to fraction form
    138,808/191,580.96 = 79,192/x
  3. Step 3: Cross multiply
    138,808x = 191,580.96 × 79,192
  4. Step 4: Simplify right side
    138,808x = 15,171,679,384.32
  5. Step 5: Solve for x
    x = 15,171,679,384.32/138,808
  6. Step 6: Final answer
    x = 109,299.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.