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Finding the Fourth Proportional to 210,375.80, 315,561.42 and 168,057.35

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Solution

The fourth proportional to 210,375.80, 315,561.42 and 168,057.35 is: 252,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,375.80 : 315,561.42 = 168,057.35 : x
  2. Step 2: Convert to fraction form
    210,375.80/315,561.42 = 168,057.35/x
  3. Step 3: Cross multiply
    210,375.80x = 315,561.42 × 168,057.35
  4. Step 4: Simplify right side
    210,375.80x = 53,032,415,612.99
  5. Step 5: Solve for x
    x = 53,032,415,612.99/210,375.80
  6. Step 6: Final answer
    x = 252,084.20

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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.