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Finding the Fourth Proportional to 239,178, 330,065.68 and 138,634.32

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Solution

The fourth proportional to 239,178, 330,065.68 and 138,634.32 is: 191,315.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,178 : 330,065.68 = 138,634.32 : x
  2. Step 2: Convert to fraction form
    239,178/330,065.68 = 138,634.32/x
  3. Step 3: Cross multiply
    239,178x = 330,065.68 × 138,634.32
  4. Step 4: Simplify right side
    239,178x = 45,758,431,102.14
  5. Step 5: Solve for x
    x = 45,758,431,102.14/239,178
  6. Step 6: Final answer
    x = 191,315.38

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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.