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Finding the Fourth Proportional to 78,989.80, 118,531.53 and 29,104.92

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Solution

The fourth proportional to 78,989.80, 118,531.53 and 29,104.92 is: 43,674.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.80 : 118,531.53 = 29,104.92 : x
  2. Step 2: Convert to fraction form
    78,989.80/118,531.53 = 29,104.92/x
  3. Step 3: Cross multiply
    78,989.80x = 118,531.53 × 29,104.92
  4. Step 4: Simplify right side
    78,989.80x = 3,449,850,698.13
  5. Step 5: Solve for x
    x = 3,449,850,698.13/78,989.80
  6. Step 6: Final answer
    x = 43,674.64

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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.