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Finding the Fourth Proportional to 205,878.10, 308,932.35 and 87,529.30

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Solution

The fourth proportional to 205,878.10, 308,932.35 and 87,529.30 is: 131,342.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,878.10 : 308,932.35 = 87,529.30 : x
  2. Step 2: Convert to fraction form
    205,878.10/308,932.35 = 87,529.30/x
  3. Step 3: Cross multiply
    205,878.10x = 308,932.35 × 87,529.30
  4. Step 4: Simplify right side
    205,878.10x = 27,040,632,342.86
  5. Step 5: Solve for x
    x = 27,040,632,342.86/205,878.10
  6. Step 6: Final answer
    x = 131,342.93

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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.