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Finding the Fourth Proportional to 117,640.48, 162,351.12 and 67,338.40

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Solution

The fourth proportional to 117,640.48, 162,351.12 and 67,338.40 is: 92,931.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,640.48 : 162,351.12 = 67,338.40 : x
  2. Step 2: Convert to fraction form
    117,640.48/162,351.12 = 67,338.40/x
  3. Step 3: Cross multiply
    117,640.48x = 162,351.12 × 67,338.40
  4. Step 4: Simplify right side
    117,640.48x = 10,932,464,659.01
  5. Step 5: Solve for x
    x = 10,932,464,659.01/117,640.48
  6. Step 6: Final answer
    x = 92,931.15

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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.