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Finding the Fourth Proportional to 117,250, 161,938.65 and 79,458.64

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Solution

The fourth proportional to 117,250, 161,938.65 and 79,458.64 is: 109,743.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,250 : 161,938.65 = 79,458.64 : x
  2. Step 2: Convert to fraction form
    117,250/161,938.65 = 79,458.64/x
  3. Step 3: Cross multiply
    117,250x = 161,938.65 × 79,458.64
  4. Step 4: Simplify right side
    117,250x = 12,867,424,892.44
  5. Step 5: Solve for x
    x = 12,867,424,892.44/117,250
  6. Step 6: Final answer
    x = 109,743.50

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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.