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Finding the Fourth Proportional to 210,500.66, 315,902.25 and 84,068.43

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Solution

The fourth proportional to 210,500.66, 315,902.25 and 84,068.43 is: 126,163.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,500.66 : 315,902.25 = 84,068.43 : x
  2. Step 2: Convert to fraction form
    210,500.66/315,902.25 = 84,068.43/x
  3. Step 3: Cross multiply
    210,500.66x = 315,902.25 × 84,068.43
  4. Step 4: Simplify right side
    210,500.66x = 26,557,406,190.97
  5. Step 5: Solve for x
    x = 26,557,406,190.97/210,500.66
  6. Step 6: Final answer
    x = 126,163.06

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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.