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Finding the Fourth Proportional to 100,099.32, 138,250.44 and 68,212.86

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Solution

The fourth proportional to 100,099.32, 138,250.44 and 68,212.86 is: 94,211.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,099.32 : 138,250.44 = 68,212.86 : x
  2. Step 2: Convert to fraction form
    100,099.32/138,250.44 = 68,212.86/x
  3. Step 3: Cross multiply
    100,099.32x = 138,250.44 × 68,212.86
  4. Step 4: Simplify right side
    100,099.32x = 9,430,457,908.66
  5. Step 5: Solve for x
    x = 9,430,457,908.66/100,099.32
  6. Step 6: Final answer
    x = 94,211.01

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1.5x scale

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.