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Finding the Fourth Proportional to 208,078.05, 312,119.72 and 73,136.67

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Solution

The fourth proportional to 208,078.05, 312,119.72 and 73,136.67 is: 109,705.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,078.05 : 312,119.72 = 73,136.67 : x
  2. Step 2: Convert to fraction form
    208,078.05/312,119.72 = 73,136.67/x
  3. Step 3: Cross multiply
    208,078.05x = 312,119.72 × 73,136.67
  4. Step 4: Simplify right side
    208,078.05x = 22,827,396,962.13
  5. Step 5: Solve for x
    x = 22,827,396,962.13/208,078.05
  6. Step 6: Final answer
    x = 109,705.93

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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.