Home / 212,721.21-319,141.13-92,788.88

Finding the Fourth Proportional to 212,721.21, 319,141.13 and 92,788.88

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Solution

The fourth proportional to 212,721.21, 319,141.13 and 92,788.88 is: 139,209.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,721.21 : 319,141.13 = 92,788.88 : x
  2. Step 2: Convert to fraction form
    212,721.21/319,141.13 = 92,788.88/x
  3. Step 3: Cross multiply
    212,721.21x = 319,141.13 × 92,788.88
  4. Step 4: Simplify right side
    212,721.21x = 29,612,745,954.98
  5. Step 5: Solve for x
    x = 29,612,745,954.98/212,721.21
  6. Step 6: Final answer
    x = 139,209.18

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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.