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Finding the Fourth Proportional to 111,985.71, 154,529.07 and 68,958.30

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Solution

The fourth proportional to 111,985.71, 154,529.07 and 68,958.30 is: 95,155.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,985.71 : 154,529.07 = 68,958.30 : x
  2. Step 2: Convert to fraction form
    111,985.71/154,529.07 = 68,958.30/x
  3. Step 3: Cross multiply
    111,985.71x = 154,529.07 × 68,958.30
  4. Step 4: Simplify right side
    111,985.71x = 10,656,062,288.67
  5. Step 5: Solve for x
    x = 10,656,062,288.67/111,985.71
  6. Step 6: Final answer
    x = 95,155.56

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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.