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Finding the Fourth Proportional to 100,817.92, 139,126.98 and 55,496.80

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Solution

The fourth proportional to 100,817.92, 139,126.98 and 55,496.80 is: 76,584.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,817.92 : 139,126.98 = 55,496.80 : x
  2. Step 2: Convert to fraction form
    100,817.92/139,126.98 = 55,496.80/x
  3. Step 3: Cross multiply
    100,817.92x = 139,126.98 × 55,496.80
  4. Step 4: Simplify right side
    100,817.92x = 7,721,102,183.66
  5. Step 5: Solve for x
    x = 7,721,102,183.66/100,817.92
  6. Step 6: Final answer
    x = 76,584.62

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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.