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Finding the Fourth Proportional to 78,998.60, 118,514.10 and 26,445.80

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Solution

The fourth proportional to 78,998.60, 118,514.10 and 26,445.80 is: 39,674.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,998.60 : 118,514.10 = 26,445.80 : x
  2. Step 2: Convert to fraction form
    78,998.60/118,514.10 = 26,445.80/x
  3. Step 3: Cross multiply
    78,998.60x = 118,514.10 × 26,445.80
  4. Step 4: Simplify right side
    78,998.60x = 3,134,200,185.78
  5. Step 5: Solve for x
    x = 3,134,200,185.78/78,998.60
  6. Step 6: Final answer
    x = 39,674.12

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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.