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Finding the Fourth Proportional to 139,703.49, 192,785.09 and 79,272.86

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Solution

The fourth proportional to 139,703.49, 192,785.09 and 79,272.86 is: 109,393.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,703.49 : 192,785.09 = 79,272.86 : x
  2. Step 2: Convert to fraction form
    139,703.49/192,785.09 = 79,272.86/x
  3. Step 3: Cross multiply
    139,703.49x = 192,785.09 × 79,272.86
  4. Step 4: Simplify right side
    139,703.49x = 15,282,624,089.37
  5. Step 5: Solve for x
    x = 15,282,624,089.37/139,703.49
  6. Step 6: Final answer
    x = 109,393.29

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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.