Home / 90,339.42-135,361.30-54,692.70

Finding the Fourth Proportional to 90,339.42, 135,361.30 and 54,692.70

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Solution

The fourth proportional to 90,339.42, 135,361.30 and 54,692.70 is: 81,949.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,339.42 : 135,361.30 = 54,692.70 : x
  2. Step 2: Convert to fraction form
    90,339.42/135,361.30 = 54,692.70/x
  3. Step 3: Cross multiply
    90,339.42x = 135,361.30 × 54,692.70
  4. Step 4: Simplify right side
    90,339.42x = 7,403,274,972.51
  5. Step 5: Solve for x
    x = 7,403,274,972.51/90,339.42
  6. Step 6: Final answer
    x = 81,949.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.