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Finding the Fourth Proportional to 74,747.91, 103,150.80 and 40,756.67

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Solution

The fourth proportional to 74,747.91, 103,150.80 and 40,756.67 is: 56,243.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,747.91 : 103,150.80 = 40,756.67 : x
  2. Step 2: Convert to fraction form
    74,747.91/103,150.80 = 40,756.67/x
  3. Step 3: Cross multiply
    74,747.91x = 103,150.80 × 40,756.67
  4. Step 4: Simplify right side
    74,747.91x = 4,204,082,600.08
  5. Step 5: Solve for x
    x = 4,204,082,600.08/74,747.91
  6. Step 6: Final answer
    x = 56,243.48

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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.