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Finding the Fourth Proportional to 100,861.91, 139,184.33 and 55,531.32

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Solution

The fourth proportional to 100,861.91, 139,184.33 and 55,531.32 is: 76,630.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,861.91 : 139,184.33 = 55,531.32 : x
  2. Step 2: Convert to fraction form
    100,861.91/139,184.33 = 55,531.32/x
  3. Step 3: Cross multiply
    100,861.91x = 139,184.33 × 55,531.32
  4. Step 4: Simplify right side
    100,861.91x = 7,729,089,551.53
  5. Step 5: Solve for x
    x = 7,729,089,551.53/100,861.91
  6. Step 6: Final answer
    x = 76,630.41

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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.