Home / 214,253.10-321,489-87,990.30

Finding the Fourth Proportional to 214,253.10, 321,489 and 87,990.30

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Solution

The fourth proportional to 214,253.10, 321,489 and 87,990.30 is: 132,030.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,253.10 : 321,489 = 87,990.30 : x
  2. Step 2: Convert to fraction form
    214,253.10/321,489 = 87,990.30/x
  3. Step 3: Cross multiply
    214,253.10x = 321,489 × 87,990.30
  4. Step 4: Simplify right side
    214,253.10x = 28,287,913,556.70
  5. Step 5: Solve for x
    x = 28,287,913,556.70/214,253.10
  6. Step 6: Final answer
    x = 132,030.36

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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.