Home / 117,137.28-161,632-66,148.99

Finding the Fourth Proportional to 117,137.28, 161,632 and 66,148.99

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Solution

The fourth proportional to 117,137.28, 161,632 and 66,148.99 is: 91,275.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,137.28 : 161,632 = 66,148.99 : x
  2. Step 2: Convert to fraction form
    117,137.28/161,632 = 66,148.99/x
  3. Step 3: Cross multiply
    117,137.28x = 161,632 × 66,148.99
  4. Step 4: Simplify right side
    117,137.28x = 10,691,793,551.68
  5. Step 5: Solve for x
    x = 10,691,793,551.68/117,137.28
  6. Step 6: Final answer
    x = 91,275.75

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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.