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Finding the Fourth Proportional to 120,447.70, 180,474.45 and 72,918.73

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Solution

The fourth proportional to 120,447.70, 180,474.45 and 72,918.73 is: 109,258.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,447.70 : 180,474.45 = 72,918.73 : x
  2. Step 2: Convert to fraction form
    120,447.70/180,474.45 = 72,918.73/x
  3. Step 3: Cross multiply
    120,447.70x = 180,474.45 × 72,918.73
  4. Step 4: Simplify right side
    120,447.70x = 13,159,967,691.45
  5. Step 5: Solve for x
    x = 13,159,967,691.45/120,447.70
  6. Step 6: Final answer
    x = 109,258.77

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1.5x scale

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.