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Finding the Fourth Proportional to 117,165.78, 161,688.45 and 63,450.78

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Solution

The fourth proportional to 117,165.78, 161,688.45 and 63,450.78 is: 87,561.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,165.78 : 161,688.45 = 63,450.78 : x
  2. Step 2: Convert to fraction form
    117,165.78/161,688.45 = 63,450.78/x
  3. Step 3: Cross multiply
    117,165.78x = 161,688.45 × 63,450.78
  4. Step 4: Simplify right side
    117,165.78x = 10,259,258,269.49
  5. Step 5: Solve for x
    x = 10,259,258,269.49/117,165.78
  6. Step 6: Final answer
    x = 87,561.90

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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.