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Finding the Fourth Proportional to 80,002.80, 110,509.20 and 61,369.92

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Solution

The fourth proportional to 80,002.80, 110,509.20 and 61,369.92 is: 84,771.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,002.80 : 110,509.20 = 61,369.92 : x
  2. Step 2: Convert to fraction form
    80,002.80/110,509.20 = 61,369.92/x
  3. Step 3: Cross multiply
    80,002.80x = 110,509.20 × 61,369.92
  4. Step 4: Simplify right side
    80,002.80x = 6,781,940,763.26
  5. Step 5: Solve for x
    x = 6,781,940,763.26/80,002.80
  6. Step 6: Final answer
    x = 84,771.29

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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.