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Finding the Fourth Proportional to 189,091.60, 260,958.74 and 108,545.20

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Solution

The fourth proportional to 189,091.60, 260,958.74 and 108,545.20 is: 149,799.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,091.60 : 260,958.74 = 108,545.20 : x
  2. Step 2: Convert to fraction form
    189,091.60/260,958.74 = 108,545.20/x
  3. Step 3: Cross multiply
    189,091.60x = 260,958.74 × 108,545.20
  4. Step 4: Simplify right side
    189,091.60x = 28,325,818,625.05
  5. Step 5: Solve for x
    x = 28,325,818,625.05/189,091.60
  6. Step 6: Final answer
    x = 149,799.45

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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.