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Finding the Fourth Proportional to 117,377.28, 161,963.28 and 66,376.44

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Solution

The fourth proportional to 117,377.28, 161,963.28 and 66,376.44 is: 91,589.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,377.28 : 161,963.28 = 66,376.44 : x
  2. Step 2: Convert to fraction form
    117,377.28/161,963.28 = 66,376.44/x
  3. Step 3: Cross multiply
    117,377.28x = 161,963.28 × 66,376.44
  4. Step 4: Simplify right side
    117,377.28x = 10,750,545,937.12
  5. Step 5: Solve for x
    x = 10,750,545,937.12/117,377.28
  6. Step 6: Final answer
    x = 91,589.67

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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.