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Finding the Fourth Proportional to 128,992.98, 193,544.91 and 66,707.22

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Solution

The fourth proportional to 128,992.98, 193,544.91 and 66,707.22 is: 100,089.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,992.98 : 193,544.91 = 66,707.22 : x
  2. Step 2: Convert to fraction form
    128,992.98/193,544.91 = 66,707.22/x
  3. Step 3: Cross multiply
    128,992.98x = 193,544.91 × 66,707.22
  4. Step 4: Simplify right side
    128,992.98x = 12,910,842,891.25
  5. Step 5: Solve for x
    x = 12,910,842,891.25/128,992.98
  6. Step 6: Final answer
    x = 100,089.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.