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Finding the Fourth Proportional to 120,693.24, 166,562.36 and 66,978.72

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Solution

The fourth proportional to 120,693.24, 166,562.36 and 66,978.72 is: 92,433.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,693.24 : 166,562.36 = 66,978.72 : x
  2. Step 2: Convert to fraction form
    120,693.24/166,562.36 = 66,978.72/x
  3. Step 3: Cross multiply
    120,693.24x = 166,562.36 × 66,978.72
  4. Step 4: Simplify right side
    120,693.24x = 11,156,133,672.98
  5. Step 5: Solve for x
    x = 11,156,133,672.98/120,693.24
  6. Step 6: Final answer
    x = 92,433.79

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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.