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Finding the Fourth Proportional to 221,046.84, 331,603.08 and 78,881.04

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Solution

The fourth proportional to 221,046.84, 331,603.08 and 78,881.04 is: 118,333.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,046.84 : 331,603.08 = 78,881.04 : x
  2. Step 2: Convert to fraction form
    221,046.84/331,603.08 = 78,881.04/x
  3. Step 3: Cross multiply
    221,046.84x = 331,603.08 × 78,881.04
  4. Step 4: Simplify right side
    221,046.84x = 26,157,195,817.60
  5. Step 5: Solve for x
    x = 26,157,195,817.60/221,046.84
  6. Step 6: Final answer
    x = 118,333.27

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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.