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Finding the Fourth Proportional to 239,665, 330,737.70 and 133,681

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Solution

The fourth proportional to 239,665, 330,737.70 and 133,681 is: 184,479.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,665 : 330,737.70 = 133,681 : x
  2. Step 2: Convert to fraction form
    239,665/330,737.70 = 133,681/x
  3. Step 3: Cross multiply
    239,665x = 330,737.70 × 133,681
  4. Step 4: Simplify right side
    239,665x = 44,213,346,473.70
  5. Step 5: Solve for x
    x = 44,213,346,473.70/239,665
  6. Step 6: Final answer
    x = 184,479.78

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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.