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Finding the Fourth Proportional to 215,578.67, 297,507.76 and 120,085.43

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Solution

The fourth proportional to 215,578.67, 297,507.76 and 120,085.43 is: 165,723.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,578.67 : 297,507.76 = 120,085.43 : x
  2. Step 2: Convert to fraction form
    215,578.67/297,507.76 = 120,085.43/x
  3. Step 3: Cross multiply
    215,578.67x = 297,507.76 × 120,085.43
  4. Step 4: Simplify right side
    215,578.67x = 35,726,345,500.18
  5. Step 5: Solve for x
    x = 35,726,345,500.18/215,578.67
  6. Step 6: Final answer
    x = 165,723.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.