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Finding the Fourth Proportional to 81,080.88, 111,830.02 and 69,769.32

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Solution

The fourth proportional to 81,080.88, 111,830.02 and 69,769.32 is: 96,228.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,080.88 : 111,830.02 = 69,769.32 : x
  2. Step 2: Convert to fraction form
    81,080.88/111,830.02 = 69,769.32/x
  3. Step 3: Cross multiply
    81,080.88x = 111,830.02 × 69,769.32
  4. Step 4: Simplify right side
    81,080.88x = 7,802,304,450.99
  5. Step 5: Solve for x
    x = 7,802,304,450.99/81,080.88
  6. Step 6: Final answer
    x = 96,228.66

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1.5x scale

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.