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Finding the Fourth Proportional to 207,369.55, 311,175.30 and 87,419.21

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Solution

The fourth proportional to 207,369.55, 311,175.30 and 87,419.21 is: 131,179.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,369.55 : 311,175.30 = 87,419.21 : x
  2. Step 2: Convert to fraction form
    207,369.55/311,175.30 = 87,419.21/x
  3. Step 3: Cross multiply
    207,369.55x = 311,175.30 × 87,419.21
  4. Step 4: Simplify right side
    207,369.55x = 27,202,698,897.51
  5. Step 5: Solve for x
    x = 27,202,698,897.51/207,369.55
  6. Step 6: Final answer
    x = 131,179.81

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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.