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Finding the Fourth Proportional to 239,174, 330,060.12 and 138,630.32

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Solution

The fourth proportional to 239,174, 330,060.12 and 138,630.32 is: 191,309.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,174 : 330,060.12 = 138,630.32 : x
  2. Step 2: Convert to fraction form
    239,174/330,060.12 = 138,630.32/x
  3. Step 3: Cross multiply
    239,174x = 330,060.12 × 138,630.32
  4. Step 4: Simplify right side
    239,174x = 45,756,340,054.84
  5. Step 5: Solve for x
    x = 45,756,340,054.84/239,174
  6. Step 6: Final answer
    x = 191,309.84

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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.