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Finding the Fourth Proportional to 138,799, 208,204.26 and 40,303

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Solution

The fourth proportional to 138,799, 208,204.26 and 40,303 is: 60,456.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,799 : 208,204.26 = 40,303 : x
  2. Step 2: Convert to fraction form
    138,799/208,204.26 = 40,303/x
  3. Step 3: Cross multiply
    138,799x = 208,204.26 × 40,303
  4. Step 4: Simplify right side
    138,799x = 8,391,256,290.78
  5. Step 5: Solve for x
    x = 8,391,256,290.78/138,799
  6. Step 6: Final answer
    x = 60,456.17

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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.