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Finding the Fourth Proportional to 135,888.74, 203,890.69 and 72,692.30

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Solution

The fourth proportional to 135,888.74, 203,890.69 and 72,692.30 is: 109,069.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,888.74 : 203,890.69 = 72,692.30 : x
  2. Step 2: Convert to fraction form
    135,888.74/203,890.69 = 72,692.30/x
  3. Step 3: Cross multiply
    135,888.74x = 203,890.69 × 72,692.30
  4. Step 4: Simplify right side
    135,888.74x = 14,821,283,805.28
  5. Step 5: Solve for x
    x = 14,821,283,805.28/135,888.74
  6. Step 6: Final answer
    x = 109,069.26

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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.