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Finding the Fourth Proportional to 100,858.73, 139,186.08 and 55,540.92

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Solution

The fourth proportional to 100,858.73, 139,186.08 and 55,540.92 is: 76,647.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,858.73 : 139,186.08 = 55,540.92 : x
  2. Step 2: Convert to fraction form
    100,858.73/139,186.08 = 55,540.92/x
  3. Step 3: Cross multiply
    100,858.73x = 139,186.08 × 55,540.92
  4. Step 4: Simplify right side
    100,858.73x = 7,730,522,934.39
  5. Step 5: Solve for x
    x = 7,730,522,934.39/100,858.73
  6. Step 6: Final answer
    x = 76,647.04

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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.