Home / 120,690.29-166,554.41-66,978.78

Finding the Fourth Proportional to 120,690.29, 166,554.41 and 66,978.78

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Solution

The fourth proportional to 120,690.29, 166,554.41 and 66,978.78 is: 92,431.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,690.29 : 166,554.41 = 66,978.78 : x
  2. Step 2: Convert to fraction form
    120,690.29/166,554.41 = 66,978.78/x
  3. Step 3: Cross multiply
    120,690.29x = 166,554.41 × 66,978.78
  4. Step 4: Simplify right side
    120,690.29x = 11,155,610,850.53
  5. Step 5: Solve for x
    x = 11,155,610,850.53/120,690.29
  6. Step 6: Final answer
    x = 92,431.72

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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.