Home / 129,136.06-178,198.14-72,536.50

Finding the Fourth Proportional to 129,136.06, 178,198.14 and 72,536.50

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Solution

The fourth proportional to 129,136.06, 178,198.14 and 72,536.50 is: 100,094.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,136.06 : 178,198.14 = 72,536.50 : x
  2. Step 2: Convert to fraction form
    129,136.06/178,198.14 = 72,536.50/x
  3. Step 3: Cross multiply
    129,136.06x = 178,198.14 × 72,536.50
  4. Step 4: Simplify right side
    129,136.06x = 12,925,869,382.11
  5. Step 5: Solve for x
    x = 12,925,869,382.11/129,136.06
  6. Step 6: Final answer
    x = 100,094.96

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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.