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Finding the Fourth Proportional to 120,808.29, 166,894.50 and 79,512.67

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Solution

The fourth proportional to 120,808.29, 166,894.50 and 79,512.67 is: 109,845.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,808.29 : 166,894.50 = 79,512.67 : x
  2. Step 2: Convert to fraction form
    120,808.29/166,894.50 = 79,512.67/x
  3. Step 3: Cross multiply
    120,808.29x = 166,894.50 × 79,512.67
  4. Step 4: Simplify right side
    120,808.29x = 13,270,227,303.32
  5. Step 5: Solve for x
    x = 13,270,227,303.32/120,808.29
  6. Step 6: Final answer
    x = 109,845.34

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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.