Home / 214,375.40-321,465.90-81,211.40

Finding the Fourth Proportional to 214,375.40, 321,465.90 and 81,211.40

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Solution

The fourth proportional to 214,375.40, 321,465.90 and 81,211.40 is: 121,780.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,375.40 : 321,465.90 = 81,211.40 : x
  2. Step 2: Convert to fraction form
    214,375.40/321,465.90 = 81,211.40/x
  3. Step 3: Cross multiply
    214,375.40x = 321,465.90 × 81,211.40
  4. Step 4: Simplify right side
    214,375.40x = 26,106,695,791.26
  5. Step 5: Solve for x
    x = 26,106,695,791.26/214,375.40
  6. Step 6: Final answer
    x = 121,780.28

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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.