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Finding the Fourth Proportional to 269,208.80, 403,780.80 and 111,420.80

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Solution

The fourth proportional to 269,208.80, 403,780.80 and 111,420.80 is: 167,117.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,208.80 : 403,780.80 = 111,420.80 : x
  2. Step 2: Convert to fraction form
    269,208.80/403,780.80 = 111,420.80/x
  3. Step 3: Cross multiply
    269,208.80x = 403,780.80 × 111,420.80
  4. Step 4: Simplify right side
    269,208.80x = 44,989,579,760.64
  5. Step 5: Solve for x
    x = 44,989,579,760.64/269,208.80
  6. Step 6: Final answer
    x = 167,117.79

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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.