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Finding the Fourth Proportional to 225,809.86, 311,603.61 and 125,207.86

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Solution

The fourth proportional to 225,809.86, 311,603.61 and 125,207.86 is: 172,779.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,809.86 : 311,603.61 = 125,207.86 : x
  2. Step 2: Convert to fraction form
    225,809.86/311,603.61 = 125,207.86/x
  3. Step 3: Cross multiply
    225,809.86x = 311,603.61 × 125,207.86
  4. Step 4: Simplify right side
    225,809.86x = 39,015,221,176.37
  5. Step 5: Solve for x
    x = 39,015,221,176.37/225,809.86
  6. Step 6: Final answer
    x = 172,779.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.