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Finding the Fourth Proportional to 225,879.04, 338,830.08 and 85,649.28

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Solution

The fourth proportional to 225,879.04, 338,830.08 and 85,649.28 is: 128,478.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,879.04 : 338,830.08 = 85,649.28 : x
  2. Step 2: Convert to fraction form
    225,879.04/338,830.08 = 85,649.28/x
  3. Step 3: Cross multiply
    225,879.04x = 338,830.08 × 85,649.28
  4. Step 4: Simplify right side
    225,879.04x = 29,020,552,394.34
  5. Step 5: Solve for x
    x = 29,020,552,394.34/225,879.04
  6. Step 6: Final answer
    x = 128,478.29

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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.