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Finding the Fourth Proportional to 100,850.95, 139,169.14 and 55,520.19

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Solution

The fourth proportional to 100,850.95, 139,169.14 and 55,520.19 is: 76,615.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,850.95 : 139,169.14 = 55,520.19 : x
  2. Step 2: Convert to fraction form
    100,850.95/139,169.14 = 55,520.19/x
  3. Step 3: Cross multiply
    100,850.95x = 139,169.14 × 55,520.19
  4. Step 4: Simplify right side
    100,850.95x = 7,726,697,094.94
  5. Step 5: Solve for x
    x = 7,726,697,094.94/100,850.95
  6. Step 6: Final answer
    x = 76,615.02

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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.