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Finding the Fourth Proportional to 100,859.95, 139,181.22 and 55,529.33

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Solution

The fourth proportional to 100,859.95, 139,181.22 and 55,529.33 is: 76,627.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,859.95 : 139,181.22 = 55,529.33 : x
  2. Step 2: Convert to fraction form
    100,859.95/139,181.22 = 55,529.33/x
  3. Step 3: Cross multiply
    100,859.95x = 139,181.22 × 55,529.33
  4. Step 4: Simplify right side
    100,859.95x = 7,728,639,199.28
  5. Step 5: Solve for x
    x = 7,728,639,199.28/100,859.95
  6. Step 6: Final answer
    x = 76,627.44

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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.