Home / 77,931.20-116,879.83-21,003.77

Finding the Fourth Proportional to 77,931.20, 116,879.83 and 21,003.77

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Solution

The fourth proportional to 77,931.20, 116,879.83 and 21,003.77 is: 31,501.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,931.20 : 116,879.83 = 21,003.77 : x
  2. Step 2: Convert to fraction form
    77,931.20/116,879.83 = 21,003.77/x
  3. Step 3: Cross multiply
    77,931.20x = 116,879.83 × 21,003.77
  4. Step 4: Simplify right side
    77,931.20x = 2,454,917,306.65
  5. Step 5: Solve for x
    x = 2,454,917,306.65/77,931.20
  6. Step 6: Final answer
    x = 31,501.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.