Home / 120,718.13-166,591.01-78,276.96

Finding the Fourth Proportional to 120,718.13, 166,591.01 and 78,276.96

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Solution

The fourth proportional to 120,718.13, 166,591.01 and 78,276.96 is: 108,022.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,718.13 : 166,591.01 = 78,276.96 : x
  2. Step 2: Convert to fraction form
    120,718.13/166,591.01 = 78,276.96/x
  3. Step 3: Cross multiply
    120,718.13x = 166,591.01 × 78,276.96
  4. Step 4: Simplify right side
    120,718.13x = 13,040,238,021.82
  5. Step 5: Solve for x
    x = 13,040,238,021.82/120,718.13
  6. Step 6: Final answer
    x = 108,022.20

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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.