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Finding the Fourth Proportional to 212,866.83, 319,127.07 and 79,672.44

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Solution

The fourth proportional to 212,866.83, 319,127.07 and 79,672.44 is: 119,443.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,866.83 : 319,127.07 = 79,672.44 : x
  2. Step 2: Convert to fraction form
    212,866.83/319,127.07 = 79,672.44/x
  3. Step 3: Cross multiply
    212,866.83x = 319,127.07 × 79,672.44
  4. Step 4: Simplify right side
    212,866.83x = 25,425,632,336.95
  5. Step 5: Solve for x
    x = 25,425,632,336.95/212,866.83
  6. Step 6: Final answer
    x = 119,443.84

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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.