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Finding the Fourth Proportional to 239,958.72, 359,981.82 and 120,078.36

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Solution

The fourth proportional to 239,958.72, 359,981.82 and 120,078.36 is: 180,139.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,958.72 : 359,981.82 = 120,078.36 : x
  2. Step 2: Convert to fraction form
    239,958.72/359,981.82 = 120,078.36/x
  3. Step 3: Cross multiply
    239,958.72x = 359,981.82 × 120,078.36
  4. Step 4: Simplify right side
    239,958.72x = 43,226,026,575.42
  5. Step 5: Solve for x
    x = 43,226,026,575.42/239,958.72
  6. Step 6: Final answer
    x = 180,139.43

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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.