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Finding the Fourth Proportional to 117,161.70, 161,689.03 and 68,765.72

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Solution

The fourth proportional to 117,161.70, 161,689.03 and 68,765.72 is: 94,900.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,161.70 : 161,689.03 = 68,765.72 : x
  2. Step 2: Convert to fraction form
    117,161.70/161,689.03 = 68,765.72/x
  3. Step 3: Cross multiply
    117,161.70x = 161,689.03 × 68,765.72
  4. Step 4: Simplify right side
    117,161.70x = 11,118,661,583.69
  5. Step 5: Solve for x
    x = 11,118,661,583.69/117,161.70
  6. Step 6: Final answer
    x = 94,900.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.