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Finding the Fourth Proportional to 117,231.53, 161,771.85 and 74,785.50

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Solution

The fourth proportional to 117,231.53, 161,771.85 and 74,785.50 is: 103,199.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,231.53 : 161,771.85 = 74,785.50 : x
  2. Step 2: Convert to fraction form
    117,231.53/161,771.85 = 74,785.50/x
  3. Step 3: Cross multiply
    117,231.53x = 161,771.85 × 74,785.50
  4. Step 4: Simplify right side
    117,231.53x = 12,098,188,688.18
  5. Step 5: Solve for x
    x = 12,098,188,688.18/117,231.53
  6. Step 6: Final answer
    x = 103,199.11

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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.