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Finding the Fourth Proportional to 102,891.20, 154,336.80 and 92,004.80

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Solution

The fourth proportional to 102,891.20, 154,336.80 and 92,004.80 is: 138,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,891.20 : 154,336.80 = 92,004.80 : x
  2. Step 2: Convert to fraction form
    102,891.20/154,336.80 = 92,004.80/x
  3. Step 3: Cross multiply
    102,891.20x = 154,336.80 × 92,004.80
  4. Step 4: Simplify right side
    102,891.20x = 14,199,726,416.64
  5. Step 5: Solve for x
    x = 14,199,726,416.64/102,891.20
  6. Step 6: Final answer
    x = 138,007.20

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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.