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Finding the Fourth Proportional to 139,550.74, 192,585.09 and 79,946.26

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Solution

The fourth proportional to 139,550.74, 192,585.09 and 79,946.26 is: 110,328.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,550.74 : 192,585.09 = 79,946.26 : x
  2. Step 2: Convert to fraction form
    139,550.74/192,585.09 = 79,946.26/x
  3. Step 3: Cross multiply
    139,550.74x = 192,585.09 × 79,946.26
  4. Step 4: Simplify right side
    139,550.74x = 15,396,457,677.26
  5. Step 5: Solve for x
    x = 15,396,457,677.26/139,550.74
  6. Step 6: Final answer
    x = 110,328.74

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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.