Home / 212,890.20-319,360.76-86,503.44

Finding the Fourth Proportional to 212,890.20, 319,360.76 and 86,503.44

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Solution

The fourth proportional to 212,890.20, 319,360.76 and 86,503.44 is: 129,765.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,890.20 : 319,360.76 = 86,503.44 : x
  2. Step 2: Convert to fraction form
    212,890.20/319,360.76 = 86,503.44/x
  3. Step 3: Cross multiply
    212,890.20x = 319,360.76 × 86,503.44
  4. Step 4: Simplify right side
    212,890.20x = 27,625,804,341.01
  5. Step 5: Solve for x
    x = 27,625,804,341.01/212,890.20
  6. Step 6: Final answer
    x = 129,765.51

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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.