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Finding the Fourth Proportional to 239,270.16, 330,173.64 and 138,674.64

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Solution

The fourth proportional to 239,270.16, 330,173.64 and 138,674.64 is: 191,359.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,270.16 : 330,173.64 = 138,674.64 : x
  2. Step 2: Convert to fraction form
    239,270.16/330,173.64 = 138,674.64/x
  3. Step 3: Cross multiply
    239,270.16x = 330,173.64 × 138,674.64
  4. Step 4: Simplify right side
    239,270.16x = 45,786,710,664.49
  5. Step 5: Solve for x
    x = 45,786,710,664.49/239,270.16
  6. Step 6: Final answer
    x = 191,359.89

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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.