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Finding the Fourth Proportional to 101,012.96, 139,398.80 and 55,692.56

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Solution

The fourth proportional to 101,012.96, 139,398.80 and 55,692.56 is: 76,856.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,012.96 : 139,398.80 = 55,692.56 : x
  2. Step 2: Convert to fraction form
    101,012.96/139,398.80 = 55,692.56/x
  3. Step 3: Cross multiply
    101,012.96x = 139,398.80 × 55,692.56
  4. Step 4: Simplify right side
    101,012.96x = 7,763,476,032.93
  5. Step 5: Solve for x
    x = 7,763,476,032.93/101,012.96
  6. Step 6: Final answer
    x = 76,856.24

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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.