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Finding the Fourth Proportional to 139,331.57, 192,357.27 and 91,723.32

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Solution

The fourth proportional to 139,331.57, 192,357.27 and 91,723.32 is: 126,630.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,331.57 : 192,357.27 = 91,723.32 : x
  2. Step 2: Convert to fraction form
    139,331.57/192,357.27 = 91,723.32/x
  3. Step 3: Cross multiply
    139,331.57x = 192,357.27 × 91,723.32
  4. Step 4: Simplify right side
    139,331.57x = 17,643,647,430.54
  5. Step 5: Solve for x
    x = 17,643,647,430.54/139,331.57
  6. Step 6: Final answer
    x = 126,630.66

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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.