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Finding the Fourth Proportional to 212,959.48, 319,493.26 and 79,840.12

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Solution

The fourth proportional to 212,959.48, 319,493.26 and 79,840.12 is: 119,780.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,959.48 : 319,493.26 = 79,840.12 : x
  2. Step 2: Convert to fraction form
    212,959.48/319,493.26 = 79,840.12/x
  3. Step 3: Cross multiply
    212,959.48x = 319,493.26 × 79,840.12
  4. Step 4: Simplify right side
    212,959.48x = 25,508,380,217.59
  5. Step 5: Solve for x
    x = 25,508,380,217.59/212,959.48
  6. Step 6: Final answer
    x = 119,780.44

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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.