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Finding the Fourth Proportional to 138,636.12, 207,991.02 and 43,867.98

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Solution

The fourth proportional to 138,636.12, 207,991.02 and 43,867.98 is: 65,813.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,636.12 : 207,991.02 = 43,867.98 : x
  2. Step 2: Convert to fraction form
    138,636.12/207,991.02 = 43,867.98/x
  3. Step 3: Cross multiply
    138,636.12x = 207,991.02 × 43,867.98
  4. Step 4: Simplify right side
    138,636.12x = 9,124,146,575.84
  5. Step 5: Solve for x
    x = 9,124,146,575.84/138,636.12
  6. Step 6: Final answer
    x = 65,813.63

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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.