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Finding the Fourth Proportional to 117,154.72, 161,672.78 and 63,438.60

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Solution

The fourth proportional to 117,154.72, 161,672.78 and 63,438.60 is: 87,544.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,154.72 : 161,672.78 = 63,438.60 : x
  2. Step 2: Convert to fraction form
    117,154.72/161,672.78 = 63,438.60/x
  3. Step 3: Cross multiply
    117,154.72x = 161,672.78 × 63,438.60
  4. Step 4: Simplify right side
    117,154.72x = 10,256,294,821.31
  5. Step 5: Solve for x
    x = 10,256,294,821.31/117,154.72
  6. Step 6: Final answer
    x = 87,544.87

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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.