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Finding the Fourth Proportional to 90,958.92, 136,235.40 and 69,742.79

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Solution

The fourth proportional to 90,958.92, 136,235.40 and 69,742.79 is: 104,458.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,958.92 : 136,235.40 = 69,742.79 : x
  2. Step 2: Convert to fraction form
    90,958.92/136,235.40 = 69,742.79/x
  3. Step 3: Cross multiply
    90,958.92x = 136,235.40 × 69,742.79
  4. Step 4: Simplify right side
    90,958.92x = 9,501,436,211.59
  5. Step 5: Solve for x
    x = 9,501,436,211.59/90,958.92
  6. Step 6: Final answer
    x = 104,458.54

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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.