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Finding the Fourth Proportional to 78,989.70, 118,514.13 and 41,015.28

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Solution

The fourth proportional to 78,989.70, 118,514.13 and 41,015.28 is: 61,538.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.70 : 118,514.13 = 41,015.28 : x
  2. Step 2: Convert to fraction form
    78,989.70/118,514.13 = 41,015.28/x
  3. Step 3: Cross multiply
    78,989.70x = 118,514.13 × 41,015.28
  4. Step 4: Simplify right side
    78,989.70x = 4,860,890,225.91
  5. Step 5: Solve for x
    x = 4,860,890,225.91/78,989.70
  6. Step 6: Final answer
    x = 61,538.28

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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.