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Finding the Fourth Proportional to 221,379, 305,503.02 and 131,955

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Solution

The fourth proportional to 221,379, 305,503.02 and 131,955 is: 182,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,379 : 305,503.02 = 131,955 : x
  2. Step 2: Convert to fraction form
    221,379/305,503.02 = 131,955/x
  3. Step 3: Cross multiply
    221,379x = 305,503.02 × 131,955
  4. Step 4: Simplify right side
    221,379x = 40,312,651,004.10
  5. Step 5: Solve for x
    x = 40,312,651,004.10/221,379
  6. Step 6: Final answer
    x = 182,097.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.