Home / 129,096.18-178,131.78-80,692.38

Finding the Fourth Proportional to 129,096.18, 178,131.78 and 80,692.38

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Solution

The fourth proportional to 129,096.18, 178,131.78 and 80,692.38 is: 111,342.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,096.18 : 178,131.78 = 80,692.38 : x
  2. Step 2: Convert to fraction form
    129,096.18/178,131.78 = 80,692.38/x
  3. Step 3: Cross multiply
    129,096.18x = 178,131.78 × 80,692.38
  4. Step 4: Simplify right side
    129,096.18x = 14,373,877,281.84
  5. Step 5: Solve for x
    x = 14,373,877,281.84/129,096.18
  6. Step 6: Final answer
    x = 111,342.39

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1.5x scale

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.