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Finding the Fourth Proportional to 101,089.80, 139,503.52 and 55,770.60

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Solution

The fourth proportional to 101,089.80, 139,503.52 and 55,770.60 is: 76,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,089.80 : 139,503.52 = 55,770.60 : x
  2. Step 2: Convert to fraction form
    101,089.80/139,503.52 = 55,770.60/x
  3. Step 3: Cross multiply
    101,089.80x = 139,503.52 × 55,770.60
  4. Step 4: Simplify right side
    101,089.80x = 7,780,195,605.36
  5. Step 5: Solve for x
    x = 7,780,195,605.36/101,089.80
  6. Step 6: Final answer
    x = 76,963.21

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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.