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Finding the Fourth Proportional to 123,205.80, 170,054.99 and 69,521.79

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Solution

The fourth proportional to 123,205.80, 170,054.99 and 69,521.79 is: 95,957.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,205.80 : 170,054.99 = 69,521.79 : x
  2. Step 2: Convert to fraction form
    123,205.80/170,054.99 = 69,521.79/x
  3. Step 3: Cross multiply
    123,205.80x = 170,054.99 × 69,521.79
  4. Step 4: Simplify right side
    123,205.80x = 11,822,526,955.62
  5. Step 5: Solve for x
    x = 11,822,526,955.62/123,205.80
  6. Step 6: Final answer
    x = 95,957.55

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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.