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Finding the Fourth Proportional to 220,518.78, 330,360.81 and 130,291.66

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Solution

The fourth proportional to 220,518.78, 330,360.81 and 130,291.66 is: 195,190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,518.78 : 330,360.81 = 130,291.66 : x
  2. Step 2: Convert to fraction form
    220,518.78/330,360.81 = 130,291.66/x
  3. Step 3: Cross multiply
    220,518.78x = 330,360.81 × 130,291.66
  4. Step 4: Simplify right side
    220,518.78x = 43,043,258,333.84
  5. Step 5: Solve for x
    x = 43,043,258,333.84/220,518.78
  6. Step 6: Final answer
    x = 195,190.90

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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.