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Finding the Fourth Proportional to 138,802, 208,208.76 and 40,306

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Solution

The fourth proportional to 138,802, 208,208.76 and 40,306 is: 60,460.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,802 : 208,208.76 = 40,306 : x
  2. Step 2: Convert to fraction form
    138,802/208,208.76 = 40,306/x
  3. Step 3: Cross multiply
    138,802x = 208,208.76 × 40,306
  4. Step 4: Simplify right side
    138,802x = 8,392,062,280.56
  5. Step 5: Solve for x
    x = 8,392,062,280.56/138,802
  6. Step 6: Final answer
    x = 60,460.67

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.