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Finding the Fourth Proportional to 102,892.80, 154,339.20 and 91,739.10

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Solution

The fourth proportional to 102,892.80, 154,339.20 and 91,739.10 is: 137,608.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,892.80 : 154,339.20 = 91,739.10 : x
  2. Step 2: Convert to fraction form
    102,892.80/154,339.20 = 91,739.10/x
  3. Step 3: Cross multiply
    102,892.80x = 154,339.20 × 91,739.10
  4. Step 4: Simplify right side
    102,892.80x = 14,158,939,302.72
  5. Step 5: Solve for x
    x = 14,158,939,302.72/102,892.80
  6. Step 6: Final answer
    x = 137,608.65

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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.