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Finding the Fourth Proportional to 80,393.40, 120,590.10 and 27,808.20

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Solution

The fourth proportional to 80,393.40, 120,590.10 and 27,808.20 is: 41,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,393.40 : 120,590.10 = 27,808.20 : x
  2. Step 2: Convert to fraction form
    80,393.40/120,590.10 = 27,808.20/x
  3. Step 3: Cross multiply
    80,393.40x = 120,590.10 × 27,808.20
  4. Step 4: Simplify right side
    80,393.40x = 3,353,393,618.82
  5. Step 5: Solve for x
    x = 3,353,393,618.82/80,393.40
  6. Step 6: Final answer
    x = 41,712.30

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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.