Home / 139,923.18-193,081.77-77,821.79

Finding the Fourth Proportional to 139,923.18, 193,081.77 and 77,821.79

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Solution

The fourth proportional to 139,923.18, 193,081.77 and 77,821.79 is: 107,387.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,923.18 : 193,081.77 = 77,821.79 : x
  2. Step 2: Convert to fraction form
    139,923.18/193,081.77 = 77,821.79/x
  3. Step 3: Cross multiply
    139,923.18x = 193,081.77 × 77,821.79
  4. Step 4: Simplify right side
    139,923.18x = 15,025,967,992.36
  5. Step 5: Solve for x
    x = 15,025,967,992.36/139,923.18
  6. Step 6: Final answer
    x = 107,387.27

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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.