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Finding the Fourth Proportional to 213,388.75, 319,976.47 and 71,184.52

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Solution

The fourth proportional to 213,388.75, 319,976.47 and 71,184.52 is: 106,741.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,388.75 : 319,976.47 = 71,184.52 : x
  2. Step 2: Convert to fraction form
    213,388.75/319,976.47 = 71,184.52/x
  3. Step 3: Cross multiply
    213,388.75x = 319,976.47 × 71,184.52
  4. Step 4: Simplify right side
    213,388.75x = 22,777,371,428.24
  5. Step 5: Solve for x
    x = 22,777,371,428.24/213,388.75
  6. Step 6: Final answer
    x = 106,741.20

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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.