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Finding the Fourth Proportional to 107,491.20, 161,121.60 and 40,905.60

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Solution

The fourth proportional to 107,491.20, 161,121.60 and 40,905.60 is: 61,314.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,491.20 : 161,121.60 = 40,905.60 : x
  2. Step 2: Convert to fraction form
    107,491.20/161,121.60 = 40,905.60/x
  3. Step 3: Cross multiply
    107,491.20x = 161,121.60 × 40,905.60
  4. Step 4: Simplify right side
    107,491.20x = 6,590,775,720.96
  5. Step 5: Solve for x
    x = 6,590,775,720.96/107,491.20
  6. Step 6: Final answer
    x = 61,314.56

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1.5x scale

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.