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Finding the Fourth Proportional to 139,712.42, 192,795.32 and 76,046.42

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Solution

The fourth proportional to 139,712.42, 192,795.32 and 76,046.42 is: 104,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,712.42 : 192,795.32 = 76,046.42 : x
  2. Step 2: Convert to fraction form
    139,712.42/192,795.32 = 76,046.42/x
  3. Step 3: Cross multiply
    139,712.42x = 192,795.32 × 76,046.42
  4. Step 4: Simplify right side
    139,712.42x = 14,661,393,878.75
  5. Step 5: Solve for x
    x = 14,661,393,878.75/139,712.42
  6. Step 6: Final answer
    x = 104,939.80

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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.