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Finding the Fourth Proportional to 120,808.32, 166,719.30 and 72,394.29

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Solution

The fourth proportional to 120,808.32, 166,719.30 and 72,394.29 is: 99,906.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,808.32 : 166,719.30 = 72,394.29 : x
  2. Step 2: Convert to fraction form
    120,808.32/166,719.30 = 72,394.29/x
  3. Step 3: Cross multiply
    120,808.32x = 166,719.30 × 72,394.29
  4. Step 4: Simplify right side
    120,808.32x = 12,069,524,990.83
  5. Step 5: Solve for x
    x = 12,069,524,990.83/120,808.32
  6. Step 6: Final answer
    x = 99,906.41

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1.5x scale

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.