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Finding the Fourth Proportional to 102,907.80, 154,249.08 and 52,990.92

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Solution

The fourth proportional to 102,907.80, 154,249.08 and 52,990.92 is: 79,428.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,907.80 : 154,249.08 = 52,990.92 : x
  2. Step 2: Convert to fraction form
    102,907.80/154,249.08 = 52,990.92/x
  3. Step 3: Cross multiply
    102,907.80x = 154,249.08 × 52,990.92
  4. Step 4: Simplify right side
    102,907.80x = 8,173,800,658.35
  5. Step 5: Solve for x
    x = 8,173,800,658.35/102,907.80
  6. Step 6: Final answer
    x = 79,428.39

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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.