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Finding the Fourth Proportional to 210,630.60, 315,945.90 and 130,914.45

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Solution

The fourth proportional to 210,630.60, 315,945.90 and 130,914.45 is: 196,371.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,630.60 : 315,945.90 = 130,914.45 : x
  2. Step 2: Convert to fraction form
    210,630.60/315,945.90 = 130,914.45/x
  3. Step 3: Cross multiply
    210,630.60x = 315,945.90 × 130,914.45
  4. Step 4: Simplify right side
    210,630.60x = 41,361,883,728.26
  5. Step 5: Solve for x
    x = 41,361,883,728.26/210,630.60
  6. Step 6: Final answer
    x = 196,371.68

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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.