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Finding the Fourth Proportional to 239,381.42, 358,949.75 and 79,399.61

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Solution

The fourth proportional to 239,381.42, 358,949.75 and 79,399.61 is: 119,058.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,381.42 : 358,949.75 = 79,399.61 : x
  2. Step 2: Convert to fraction form
    239,381.42/358,949.75 = 79,399.61/x
  3. Step 3: Cross multiply
    239,381.42x = 358,949.75 × 79,399.61
  4. Step 4: Simplify right side
    239,381.42x = 28,500,467,967.85
  5. Step 5: Solve for x
    x = 28,500,467,967.85/239,381.42
  6. Step 6: Final answer
    x = 119,058.82

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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.