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Finding the Fourth Proportional to 239,818.32, 330,839.64 and 139,158

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Solution

The fourth proportional to 239,818.32, 330,839.64 and 139,158 is: 191,974.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,818.32 : 330,839.64 = 139,158 : x
  2. Step 2: Convert to fraction form
    239,818.32/330,839.64 = 139,158/x
  3. Step 3: Cross multiply
    239,818.32x = 330,839.64 × 139,158
  4. Step 4: Simplify right side
    239,818.32x = 46,038,982,623.12
  5. Step 5: Solve for x
    x = 46,038,982,623.12/239,818.32
  6. Step 6: Final answer
    x = 191,974.42

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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.