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Finding the Fourth Proportional to 107,885.20, 162,000.60 and 81,619.60

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Solution

The fourth proportional to 107,885.20, 162,000.60 and 81,619.60 is: 122,560.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,885.20 : 162,000.60 = 81,619.60 : x
  2. Step 2: Convert to fraction form
    107,885.20/162,000.60 = 81,619.60/x
  3. Step 3: Cross multiply
    107,885.20x = 162,000.60 × 81,619.60
  4. Step 4: Simplify right side
    107,885.20x = 13,222,424,171.76
  5. Step 5: Solve for x
    x = 13,222,424,171.76/107,885.20
  6. Step 6: Final answer
    x = 122,560.13

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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.