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Finding the Fourth Proportional to 215,853.72, 323,826.66 and 75,620.76

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Solution

The fourth proportional to 215,853.72, 323,826.66 and 75,620.76 is: 113,447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,853.72 : 323,826.66 = 75,620.76 : x
  2. Step 2: Convert to fraction form
    215,853.72/323,826.66 = 75,620.76/x
  3. Step 3: Cross multiply
    215,853.72x = 323,826.66 × 75,620.76
  4. Step 4: Simplify right side
    215,853.72x = 24,488,018,137.46
  5. Step 5: Solve for x
    x = 24,488,018,137.46/215,853.72
  6. Step 6: Final answer
    x = 113,447.28

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1.5x scale

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.