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Finding the Fourth Proportional to 138,418.88, 207,648.36 and 43,616.98

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Solution

The fourth proportional to 138,418.88, 207,648.36 and 43,616.98 is: 65,431.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,418.88 : 207,648.36 = 43,616.98 : x
  2. Step 2: Convert to fraction form
    138,418.88/207,648.36 = 43,616.98/x
  3. Step 3: Cross multiply
    138,418.88x = 207,648.36 × 43,616.98
  4. Step 4: Simplify right side
    138,418.88x = 9,056,994,624.71
  5. Step 5: Solve for x
    x = 9,056,994,624.71/138,418.88
  6. Step 6: Final answer
    x = 65,431.79

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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.