Home / 215,910.09-323,874.86-66,139.47

Finding the Fourth Proportional to 215,910.09, 323,874.86 and 66,139.47

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Solution

The fourth proportional to 215,910.09, 323,874.86 and 66,139.47 is: 99,212.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,910.09 : 323,874.86 = 66,139.47 : x
  2. Step 2: Convert to fraction form
    215,910.09/323,874.86 = 66,139.47/x
  3. Step 3: Cross multiply
    215,910.09x = 323,874.86 × 66,139.47
  4. Step 4: Simplify right side
    215,910.09x = 21,420,911,256.03
  5. Step 5: Solve for x
    x = 21,420,911,256.03/215,910.09
  6. Step 6: Final answer
    x = 99,212.18

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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.