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Finding the Fourth Proportional to 74,674.78, 103,049.99 and 40,683.67

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Solution

The fourth proportional to 74,674.78, 103,049.99 and 40,683.67 is: 56,142.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,674.78 : 103,049.99 = 40,683.67 : x
  2. Step 2: Convert to fraction form
    74,674.78/103,049.99 = 40,683.67/x
  3. Step 3: Cross multiply
    74,674.78x = 103,049.99 × 40,683.67
  4. Step 4: Simplify right side
    74,674.78x = 4,192,451,478.18
  5. Step 5: Solve for x
    x = 4,192,451,478.18/74,674.78
  6. Step 6: Final answer
    x = 56,142.81

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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.