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Finding the Fourth Proportional to 100,342.75, 150,587.43 and 80,856.58

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Solution

The fourth proportional to 100,342.75, 150,587.43 and 80,856.58 is: 121,343.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,342.75 : 150,587.43 = 80,856.58 : x
  2. Step 2: Convert to fraction form
    100,342.75/150,587.43 = 80,856.58/x
  3. Step 3: Cross multiply
    100,342.75x = 150,587.43 × 80,856.58
  4. Step 4: Simplify right side
    100,342.75x = 12,175,984,580.79
  5. Step 5: Solve for x
    x = 12,175,984,580.79/100,342.75
  6. Step 6: Final answer
    x = 121,343.94

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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.