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Finding the Fourth Proportional to 90,645.82, 135,922.04 and 40,683.08

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Solution

The fourth proportional to 90,645.82, 135,922.04 and 40,683.08 is: 61,003.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,645.82 : 135,922.04 = 40,683.08 : x
  2. Step 2: Convert to fraction form
    90,645.82/135,922.04 = 40,683.08/x
  3. Step 3: Cross multiply
    90,645.82x = 135,922.04 × 40,683.08
  4. Step 4: Simplify right side
    90,645.82x = 5,529,727,023.67
  5. Step 5: Solve for x
    x = 5,529,727,023.67/90,645.82
  6. Step 6: Final answer
    x = 61,003.67

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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.