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Finding the Fourth Proportional to 269,010.70, 403,472.85 and 81,978.70

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Solution

The fourth proportional to 269,010.70, 403,472.85 and 81,978.70 is: 122,954.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,010.70 : 403,472.85 = 81,978.70 : x
  2. Step 2: Convert to fraction form
    269,010.70/403,472.85 = 81,978.70/x
  3. Step 3: Cross multiply
    269,010.70x = 403,472.85 × 81,978.70
  4. Step 4: Simplify right side
    269,010.70x = 33,076,179,728.30
  5. Step 5: Solve for x
    x = 33,076,179,728.30/269,010.70
  6. Step 6: Final answer
    x = 122,954.89

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1.5x scale

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.