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Finding the Fourth Proportional to 220,955.60, 331,476.60 and 87,813.20

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Solution

The fourth proportional to 220,955.60, 331,476.60 and 87,813.20 is: 131,736.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,955.60 : 331,476.60 = 87,813.20 : x
  2. Step 2: Convert to fraction form
    220,955.60/331,476.60 = 87,813.20/x
  3. Step 3: Cross multiply
    220,955.60x = 331,476.60 × 87,813.20
  4. Step 4: Simplify right side
    220,955.60x = 29,108,020,971.12
  5. Step 5: Solve for x
    x = 29,108,020,971.12/220,955.60
  6. Step 6: Final answer
    x = 131,736.97

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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.