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Finding the Fourth Proportional to 111,964.80, 167,720.40 and 69,715.20

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Solution

The fourth proportional to 111,964.80, 167,720.40 and 69,715.20 is: 104,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,964.80 : 167,720.40 = 69,715.20 : x
  2. Step 2: Convert to fraction form
    111,964.80/167,720.40 = 69,715.20/x
  3. Step 3: Cross multiply
    111,964.80x = 167,720.40 × 69,715.20
  4. Step 4: Simplify right side
    111,964.80x = 11,692,661,230.08
  5. Step 5: Solve for x
    x = 11,692,661,230.08/111,964.80
  6. Step 6: Final answer
    x = 104,431.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.