Home / 120,961.40-166,931.02-66,517.72

Finding the Fourth Proportional to 120,961.40, 166,931.02 and 66,517.72

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Solution

The fourth proportional to 120,961.40, 166,931.02 and 66,517.72 is: 91,796.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,961.40 : 166,931.02 = 66,517.72 : x
  2. Step 2: Convert to fraction form
    120,961.40/166,931.02 = 66,517.72/x
  3. Step 3: Cross multiply
    120,961.40x = 166,931.02 × 66,517.72
  4. Step 4: Simplify right side
    120,961.40x = 11,103,870,013.02
  5. Step 5: Solve for x
    x = 11,103,870,013.02/120,961.40
  6. Step 6: Final answer
    x = 91,796.80

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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.