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Finding the Fourth Proportional to 120,813.29, 166,724.40 and 66,367.76

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Solution

The fourth proportional to 120,813.29, 166,724.40 and 66,367.76 is: 91,588.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,813.29 : 166,724.40 = 66,367.76 : x
  2. Step 2: Convert to fraction form
    120,813.29/166,724.40 = 66,367.76/x
  3. Step 3: Cross multiply
    120,813.29x = 166,724.40 × 66,367.76
  4. Step 4: Simplify right side
    120,813.29x = 11,065,124,131.72
  5. Step 5: Solve for x
    x = 11,065,124,131.72/120,813.29
  6. Step 6: Final answer
    x = 91,588.64

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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.