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Finding the Fourth Proportional to 210,616.80, 315,926.55 and 84,267.60

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Solution

The fourth proportional to 210,616.80, 315,926.55 and 84,267.60 is: 126,401.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,616.80 : 315,926.55 = 84,267.60 : x
  2. Step 2: Convert to fraction form
    210,616.80/315,926.55 = 84,267.60/x
  3. Step 3: Cross multiply
    210,616.80x = 315,926.55 × 84,267.60
  4. Step 4: Simplify right side
    210,616.80x = 26,622,372,144.78
  5. Step 5: Solve for x
    x = 26,622,372,144.78/210,616.80
  6. Step 6: Final answer
    x = 126,401.94

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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.