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Finding the Fourth Proportional to 139,805.36, 192,925.42 and 76,143.32

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Solution

The fourth proportional to 139,805.36, 192,925.42 and 76,143.32 is: 105,074.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,805.36 : 192,925.42 = 76,143.32 : x
  2. Step 2: Convert to fraction form
    139,805.36/192,925.42 = 76,143.32/x
  3. Step 3: Cross multiply
    139,805.36x = 192,925.42 × 76,143.32
  4. Step 4: Simplify right side
    139,805.36x = 14,689,981,991.19
  5. Step 5: Solve for x
    x = 14,689,981,991.19/139,805.36
  6. Step 6: Final answer
    x = 105,074.53

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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.