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Finding the Fourth Proportional to 101,040.95, 139,433.31 and 55,720.84

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Solution

The fourth proportional to 101,040.95, 139,433.31 and 55,720.84 is: 76,892.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,040.95 : 139,433.31 = 55,720.84 : x
  2. Step 2: Convert to fraction form
    101,040.95/139,433.31 = 55,720.84/x
  3. Step 3: Cross multiply
    101,040.95x = 139,433.31 × 55,720.84
  4. Step 4: Simplify right side
    101,040.95x = 7,769,341,157.18
  5. Step 5: Solve for x
    x = 7,769,341,157.18/101,040.95
  6. Step 6: Final answer
    x = 76,892.99

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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.