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Finding the Fourth Proportional to 139,360.48, 209,066.64 and 45,872.80

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Solution

The fourth proportional to 139,360.48, 209,066.64 and 45,872.80 is: 68,817.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,360.48 : 209,066.64 = 45,872.80 : x
  2. Step 2: Convert to fraction form
    139,360.48/209,066.64 = 45,872.80/x
  3. Step 3: Cross multiply
    139,360.48x = 209,066.64 × 45,872.80
  4. Step 4: Simplify right side
    139,360.48x = 9,590,472,163.39
  5. Step 5: Solve for x
    x = 9,590,472,163.39/139,360.48
  6. Step 6: Final answer
    x = 68,817.73

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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.