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Finding the Fourth Proportional to 120,888.45, 166,815.45 and 67,170.06

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Solution

The fourth proportional to 120,888.45, 166,815.45 and 67,170.06 is: 92,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,888.45 : 166,815.45 = 67,170.06 : x
  2. Step 2: Convert to fraction form
    120,888.45/166,815.45 = 67,170.06/x
  3. Step 3: Cross multiply
    120,888.45x = 166,815.45 × 67,170.06
  4. Step 4: Simplify right side
    120,888.45x = 11,205,003,785.43
  5. Step 5: Solve for x
    x = 11,205,003,785.43/120,888.45
  6. Step 6: Final answer
    x = 92,688.79

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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.