Home / 205,638.40-308,227.20-87,289.60

Finding the Fourth Proportional to 205,638.40, 308,227.20 and 87,289.60

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Solution

The fourth proportional to 205,638.40, 308,227.20 and 87,289.60 is: 130,836.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,638.40 : 308,227.20 = 87,289.60 : x
  2. Step 2: Convert to fraction form
    205,638.40/308,227.20 = 87,289.60/x
  3. Step 3: Cross multiply
    205,638.40x = 308,227.20 × 87,289.60
  4. Step 4: Simplify right side
    205,638.40x = 26,905,028,997.12
  5. Step 5: Solve for x
    x = 26,905,028,997.12/205,638.40
  6. Step 6: Final answer
    x = 130,836.60

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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.