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Finding the Fourth Proportional to 120,848.40, 166,910.40 and 80,495.76

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Solution

The fourth proportional to 120,848.40, 166,910.40 and 80,495.76 is: 111,177.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,848.40 : 166,910.40 = 80,495.76 : x
  2. Step 2: Convert to fraction form
    120,848.40/166,910.40 = 80,495.76/x
  3. Step 3: Cross multiply
    120,848.40x = 166,910.40 × 80,495.76
  4. Step 4: Simplify right side
    120,848.40x = 13,435,579,499.90
  5. Step 5: Solve for x
    x = 13,435,579,499.90/120,848.40
  6. Step 6: Final answer
    x = 111,177.14

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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.