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Finding the Fourth Proportional to 101,188.08, 139,635.90 and 55,865.07

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Solution

The fourth proportional to 101,188.08, 139,635.90 and 55,865.07 is: 77,091.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,188.08 : 139,635.90 = 55,865.07 : x
  2. Step 2: Convert to fraction form
    101,188.08/139,635.90 = 55,865.07/x
  3. Step 3: Cross multiply
    101,188.08x = 139,635.90 × 55,865.07
  4. Step 4: Simplify right side
    101,188.08x = 7,800,769,328.01
  5. Step 5: Solve for x
    x = 7,800,769,328.01/101,188.08
  6. Step 6: Final answer
    x = 77,091.78

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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.