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Finding the Fourth Proportional to 213,071.52, 319,524.20 and 79,879.18

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Solution

The fourth proportional to 213,071.52, 319,524.20 and 79,879.18 is: 119,787.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,071.52 : 319,524.20 = 79,879.18 : x
  2. Step 2: Convert to fraction form
    213,071.52/319,524.20 = 79,879.18/x
  3. Step 3: Cross multiply
    213,071.52x = 319,524.20 × 79,879.18
  4. Step 4: Simplify right side
    213,071.52x = 25,523,331,086.16
  5. Step 5: Solve for x
    x = 25,523,331,086.16/213,071.52
  6. Step 6: Final answer
    x = 119,787.62

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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.