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Finding the Fourth Proportional to 83,108.40, 124,662.60 and 76,693.20

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Solution

The fourth proportional to 83,108.40, 124,662.60 and 76,693.20 is: 115,039.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,108.40 : 124,662.60 = 76,693.20 : x
  2. Step 2: Convert to fraction form
    83,108.40/124,662.60 = 76,693.20/x
  3. Step 3: Cross multiply
    83,108.40x = 124,662.60 × 76,693.20
  4. Step 4: Simplify right side
    83,108.40x = 9,560,773,714.32
  5. Step 5: Solve for x
    x = 9,560,773,714.32/83,108.40
  6. Step 6: Final answer
    x = 115,039.80

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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.