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Finding the Fourth Proportional to 139,348.04, 192,379.95 and 91,739.77

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Solution

The fourth proportional to 139,348.04, 192,379.95 and 91,739.77 is: 126,653.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,348.04 : 192,379.95 = 91,739.77 : x
  2. Step 2: Convert to fraction form
    139,348.04/192,379.95 = 91,739.77/x
  3. Step 3: Cross multiply
    139,348.04x = 192,379.95 × 91,739.77
  4. Step 4: Simplify right side
    139,348.04x = 17,648,891,884.66
  5. Step 5: Solve for x
    x = 17,648,891,884.66/139,348.04
  6. Step 6: Final answer
    x = 126,653.32

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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.