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Finding the Fourth Proportional to 210,687.60, 315,570.60 and 163,570.80

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Solution

The fourth proportional to 210,687.60, 315,570.60 and 163,570.80 is: 244,998.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,687.60 : 315,570.60 = 163,570.80 : x
  2. Step 2: Convert to fraction form
    210,687.60/315,570.60 = 163,570.80/x
  3. Step 3: Cross multiply
    210,687.60x = 315,570.60 × 163,570.80
  4. Step 4: Simplify right side
    210,687.60x = 51,618,135,498.48
  5. Step 5: Solve for x
    x = 51,618,135,498.48/210,687.60
  6. Step 6: Final answer
    x = 244,998.45

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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.