Home / 135,692.66-187,225.89-78,319.76

Finding the Fourth Proportional to 135,692.66, 187,225.89 and 78,319.76

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Solution

The fourth proportional to 135,692.66, 187,225.89 and 78,319.76 is: 108,063.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,692.66 : 187,225.89 = 78,319.76 : x
  2. Step 2: Convert to fraction form
    135,692.66/187,225.89 = 78,319.76/x
  3. Step 3: Cross multiply
    135,692.66x = 187,225.89 × 78,319.76
  4. Step 4: Simplify right side
    135,692.66x = 14,663,486,770.59
  5. Step 5: Solve for x
    x = 14,663,486,770.59/135,692.66
  6. Step 6: Final answer
    x = 108,063.96

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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.