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Finding the Fourth Proportional to 101,280.84, 139,770.37 and 55,961.74

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Solution

The fourth proportional to 101,280.84, 139,770.37 and 55,961.74 is: 77,228.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,280.84 : 139,770.37 = 55,961.74 : x
  2. Step 2: Convert to fraction form
    101,280.84/139,770.37 = 55,961.74/x
  3. Step 3: Cross multiply
    101,280.84x = 139,770.37 × 55,961.74
  4. Step 4: Simplify right side
    101,280.84x = 7,821,792,406.79
  5. Step 5: Solve for x
    x = 7,821,792,406.79/101,280.84
  6. Step 6: Final answer
    x = 77,228.75

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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.