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Finding the Fourth Proportional to 225,710.78, 338,467.74 and 85,370.99

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Solution

The fourth proportional to 225,710.78, 338,467.74 and 85,370.99 is: 128,019.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,710.78 : 338,467.74 = 85,370.99 : x
  2. Step 2: Convert to fraction form
    225,710.78/338,467.74 = 85,370.99/x
  3. Step 3: Cross multiply
    225,710.78x = 338,467.74 × 85,370.99
  4. Step 4: Simplify right side
    225,710.78x = 28,895,323,927.67
  5. Step 5: Solve for x
    x = 28,895,323,927.67/225,710.78
  6. Step 6: Final answer
    x = 128,019.25

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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.