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Finding the Fourth Proportional to 212,882.56, 319,378.56 and 79,764.64

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Solution

The fourth proportional to 212,882.56, 319,378.56 and 79,764.64 is: 119,667.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,882.56 : 319,378.56 = 79,764.64 : x
  2. Step 2: Convert to fraction form
    212,882.56/319,378.56 = 79,764.64/x
  3. Step 3: Cross multiply
    212,882.56x = 319,378.56 × 79,764.64
  4. Step 4: Simplify right side
    212,882.56x = 25,475,115,862.12
  5. Step 5: Solve for x
    x = 25,475,115,862.12/212,882.56
  6. Step 6: Final answer
    x = 119,667.46

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1.5x scale

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.