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Finding the Fourth Proportional to 120,810.60, 181,174.80 and 45,912.72

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Solution

The fourth proportional to 120,810.60, 181,174.80 and 45,912.72 is: 68,853.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,810.60 : 181,174.80 = 45,912.72 : x
  2. Step 2: Convert to fraction form
    120,810.60/181,174.80 = 45,912.72/x
  3. Step 3: Cross multiply
    120,810.60x = 181,174.80 × 45,912.72
  4. Step 4: Simplify right side
    120,810.60x = 8,318,227,863.46
  5. Step 5: Solve for x
    x = 8,318,227,863.46/120,810.60
  6. Step 6: Final answer
    x = 68,853.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.