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Finding the Fourth Proportional to 140,080.74, 193,314.49 and 76,418.49

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Solution

The fourth proportional to 140,080.74, 193,314.49 and 76,418.49 is: 105,459.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,080.74 : 193,314.49 = 76,418.49 : x
  2. Step 2: Convert to fraction form
    140,080.74/193,314.49 = 76,418.49/x
  3. Step 3: Cross multiply
    140,080.74x = 193,314.49 × 76,418.49
  4. Step 4: Simplify right side
    140,080.74x = 14,772,800,454.35
  5. Step 5: Solve for x
    x = 14,772,800,454.35/140,080.74
  6. Step 6: Final answer
    x = 105,459.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.