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Finding the Fourth Proportional to 212,979.60, 319,728.60 and 107,744.40

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Solution

The fourth proportional to 212,979.60, 319,728.60 and 107,744.40 is: 161,747.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,979.60 : 319,728.60 = 107,744.40 : x
  2. Step 2: Convert to fraction form
    212,979.60/319,728.60 = 107,744.40/x
  3. Step 3: Cross multiply
    212,979.60x = 319,728.60 × 107,744.40
  4. Step 4: Simplify right side
    212,979.60x = 34,448,966,169.84
  5. Step 5: Solve for x
    x = 34,448,966,169.84/212,979.60
  6. Step 6: Final answer
    x = 161,747.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.