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Finding the Fourth Proportional to 80,879.16, 121,312.74 and 30,963.72

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Solution

The fourth proportional to 80,879.16, 121,312.74 and 30,963.72 is: 46,443.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,879.16 : 121,312.74 = 30,963.72 : x
  2. Step 2: Convert to fraction form
    80,879.16/121,312.74 = 30,963.72/x
  3. Step 3: Cross multiply
    80,879.16x = 121,312.74 × 30,963.72
  4. Step 4: Simplify right side
    80,879.16x = 3,756,293,713.79
  5. Step 5: Solve for x
    x = 3,756,293,713.79/80,879.16
  6. Step 6: Final answer
    x = 46,443.28

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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.