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Finding the Fourth Proportional to 123,242.54, 170,074.70 and 66,653.91

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Solution

The fourth proportional to 123,242.54, 170,074.70 and 66,653.91 is: 91,982.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,242.54 : 170,074.70 = 66,653.91 : x
  2. Step 2: Convert to fraction form
    123,242.54/170,074.70 = 66,653.91/x
  3. Step 3: Cross multiply
    123,242.54x = 170,074.70 × 66,653.91
  4. Step 4: Simplify right side
    123,242.54x = 11,336,143,413.81
  5. Step 5: Solve for x
    x = 11,336,143,413.81/123,242.54
  6. Step 6: Final answer
    x = 91,982.39

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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.