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Finding the Fourth Proportional to 111,642.98, 154,029.21 and 69,186.02

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Solution

The fourth proportional to 111,642.98, 154,029.21 and 69,186.02 is: 95,453.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,642.98 : 154,029.21 = 69,186.02 : x
  2. Step 2: Convert to fraction form
    111,642.98/154,029.21 = 69,186.02/x
  3. Step 3: Cross multiply
    111,642.98x = 154,029.21 × 69,186.02
  4. Step 4: Simplify right side
    111,642.98x = 10,656,668,003.64
  5. Step 5: Solve for x
    x = 10,656,668,003.64/111,642.98
  6. Step 6: Final answer
    x = 95,453.10

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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.