Home / 205,709.10-308,503.17-87,379.50

Finding the Fourth Proportional to 205,709.10, 308,503.17 and 87,379.50

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Solution

The fourth proportional to 205,709.10, 308,503.17 and 87,379.50 is: 131,043.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,709.10 : 308,503.17 = 87,379.50 : x
  2. Step 2: Convert to fraction form
    205,709.10/308,503.17 = 87,379.50/x
  3. Step 3: Cross multiply
    205,709.10x = 308,503.17 × 87,379.50
  4. Step 4: Simplify right side
    205,709.10x = 26,956,852,743.02
  5. Step 5: Solve for x
    x = 26,956,852,743.02/205,709.10
  6. Step 6: Final answer
    x = 131,043.56

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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.