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Finding the Fourth Proportional to 215,678.80, 323,518.20 and 75,422.80

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Solution

The fourth proportional to 215,678.80, 323,518.20 and 75,422.80 is: 113,134.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,678.80 : 323,518.20 = 75,422.80 : x
  2. Step 2: Convert to fraction form
    215,678.80/323,518.20 = 75,422.80/x
  3. Step 3: Cross multiply
    215,678.80x = 323,518.20 × 75,422.80
  4. Step 4: Simplify right side
    215,678.80x = 24,400,648,494.96
  5. Step 5: Solve for x
    x = 24,400,648,494.96/215,678.80
  6. Step 6: Final answer
    x = 113,134.20

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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.