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Finding the Fourth Proportional to 45,868.30, 68,770.05 and 20,920.30

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Solution

The fourth proportional to 45,868.30, 68,770.05 and 20,920.30 is: 31,365.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,868.30 : 68,770.05 = 20,920.30 : x
  2. Step 2: Convert to fraction form
    45,868.30/68,770.05 = 20,920.30/x
  3. Step 3: Cross multiply
    45,868.30x = 68,770.05 × 20,920.30
  4. Step 4: Simplify right side
    45,868.30x = 1,438,690,077.02
  5. Step 5: Solve for x
    x = 1,438,690,077.02/45,868.30
  6. Step 6: Final answer
    x = 31,365.67

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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.