Home / 212,665.36-319,047.42-72,425.20

Finding the Fourth Proportional to 212,665.36, 319,047.42 and 72,425.20

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Solution

The fourth proportional to 212,665.36, 319,047.42 and 72,425.20 is: 108,654.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,665.36 : 319,047.42 = 72,425.20 : x
  2. Step 2: Convert to fraction form
    212,665.36/319,047.42 = 72,425.20/x
  3. Step 3: Cross multiply
    212,665.36x = 319,047.42 × 72,425.20
  4. Step 4: Simplify right side
    212,665.36x = 23,107,073,202.98
  5. Step 5: Solve for x
    x = 23,107,073,202.98/212,665.36
  6. Step 6: Final answer
    x = 108,654.62

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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.