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Finding the Fourth Proportional to 128,371.82, 192,557.75 and 48,388.11

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Solution

The fourth proportional to 128,371.82, 192,557.75 and 48,388.11 is: 72,582.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.82 : 192,557.75 = 48,388.11 : x
  2. Step 2: Convert to fraction form
    128,371.82/192,557.75 = 48,388.11/x
  3. Step 3: Cross multiply
    128,371.82x = 192,557.75 × 48,388.11
  4. Step 4: Simplify right side
    128,371.82x = 9,317,505,346.41
  5. Step 5: Solve for x
    x = 9,317,505,346.41/128,371.82
  6. Step 6: Final answer
    x = 72,582.17

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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.