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Finding the Fourth Proportional to 139,237.59, 192,131.90 and 77,975.24

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Solution

The fourth proportional to 139,237.59, 192,131.90 and 77,975.24 is: 107,596.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,237.59 : 192,131.90 = 77,975.24 : x
  2. Step 2: Convert to fraction form
    139,237.59/192,131.90 = 77,975.24/x
  3. Step 3: Cross multiply
    139,237.59x = 192,131.90 × 77,975.24
  4. Step 4: Simplify right side
    139,237.59x = 14,981,529,956.03
  5. Step 5: Solve for x
    x = 14,981,529,956.03/139,237.59
  6. Step 6: Final answer
    x = 107,596.87

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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.