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Finding the Fourth Proportional to 117,178.65, 161,716.48 and 66,200.74

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Solution

The fourth proportional to 117,178.65, 161,716.48 and 66,200.74 is: 91,362.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,178.65 : 161,716.48 = 66,200.74 : x
  2. Step 2: Convert to fraction form
    117,178.65/161,716.48 = 66,200.74/x
  3. Step 3: Cross multiply
    117,178.65x = 161,716.48 × 66,200.74
  4. Step 4: Simplify right side
    117,178.65x = 10,705,750,076.40
  5. Step 5: Solve for x
    x = 10,705,750,076.40/117,178.65
  6. Step 6: Final answer
    x = 91,362.63

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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.