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Finding the Fourth Proportional to 123,570.32, 170,525.79 and 69,121.80

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Solution

The fourth proportional to 123,570.32, 170,525.79 and 69,121.80 is: 95,387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,570.32 : 170,525.79 = 69,121.80 : x
  2. Step 2: Convert to fraction form
    123,570.32/170,525.79 = 69,121.80/x
  3. Step 3: Cross multiply
    123,570.32x = 170,525.79 × 69,121.80
  4. Step 4: Simplify right side
    123,570.32x = 11,787,049,551.22
  5. Step 5: Solve for x
    x = 11,787,049,551.22/123,570.32
  6. Step 6: Final answer
    x = 95,387.39

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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.