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Finding the Fourth Proportional to 101,228.88, 139,692.09 and 55,905.89

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Solution

The fourth proportional to 101,228.88, 139,692.09 and 55,905.89 is: 77,148.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,228.88 : 139,692.09 = 55,905.89 : x
  2. Step 2: Convert to fraction form
    101,228.88/139,692.09 = 55,905.89/x
  3. Step 3: Cross multiply
    101,228.88x = 139,692.09 × 55,905.89
  4. Step 4: Simplify right side
    101,228.88x = 7,809,610,337.88
  5. Step 5: Solve for x
    x = 7,809,610,337.88/101,228.88
  6. Step 6: Final answer
    x = 77,148.05

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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.