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Finding the Fourth Proportional to 78,989.85, 109,006.02 and 43,179.85

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Solution

The fourth proportional to 78,989.85, 109,006.02 and 43,179.85 is: 59,588.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.85 : 109,006.02 = 43,179.85 : x
  2. Step 2: Convert to fraction form
    78,989.85/109,006.02 = 43,179.85/x
  3. Step 3: Cross multiply
    78,989.85x = 109,006.02 × 43,179.85
  4. Step 4: Simplify right side
    78,989.85x = 4,706,863,728.95
  5. Step 5: Solve for x
    x = 4,706,863,728.95/78,989.85
  6. Step 6: Final answer
    x = 59,588.21

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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.