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Finding the Fourth Proportional to 100,987.62, 151,065.06 and 83,015.88

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Solution

The fourth proportional to 100,987.62, 151,065.06 and 83,015.88 is: 124,181.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,987.62 : 151,065.06 = 83,015.88 : x
  2. Step 2: Convert to fraction form
    100,987.62/151,065.06 = 83,015.88/x
  3. Step 3: Cross multiply
    100,987.62x = 151,065.06 × 83,015.88
  4. Step 4: Simplify right side
    100,987.62x = 12,540,798,893.15
  5. Step 5: Solve for x
    x = 12,540,798,893.15/100,987.62
  6. Step 6: Final answer
    x = 124,181.55

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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.