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Finding the Fourth Proportional to 269,505.40, 404,258.10 and 91,985.80

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Solution

The fourth proportional to 269,505.40, 404,258.10 and 91,985.80 is: 137,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,505.40 : 404,258.10 = 91,985.80 : x
  2. Step 2: Convert to fraction form
    269,505.40/404,258.10 = 91,985.80/x
  3. Step 3: Cross multiply
    269,505.40x = 404,258.10 × 91,985.80
  4. Step 4: Simplify right side
    269,505.40x = 37,186,004,734.98
  5. Step 5: Solve for x
    x = 37,186,004,734.98/269,505.40
  6. Step 6: Final answer
    x = 137,978.70

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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.