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Finding the Fourth Proportional to 78,999.80, 118,269.30 and 76,695.80

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Solution

The fourth proportional to 78,999.80, 118,269.30 and 76,695.80 is: 114,820.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,999.80 : 118,269.30 = 76,695.80 : x
  2. Step 2: Convert to fraction form
    78,999.80/118,269.30 = 76,695.80/x
  3. Step 3: Cross multiply
    78,999.80x = 118,269.30 × 76,695.80
  4. Step 4: Simplify right side
    78,999.80x = 9,070,758,578.94
  5. Step 5: Solve for x
    x = 9,070,758,578.94/78,999.80
  6. Step 6: Final answer
    x = 114,820.02

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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.