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Finding the Fourth Proportional to 103,832.40, 155,921.40 and 57,118.80

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Solution

The fourth proportional to 103,832.40, 155,921.40 and 57,118.80 is: 85,773.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,832.40 : 155,921.40 = 57,118.80 : x
  2. Step 2: Convert to fraction form
    103,832.40/155,921.40 = 57,118.80/x
  3. Step 3: Cross multiply
    103,832.40x = 155,921.40 × 57,118.80
  4. Step 4: Simplify right side
    103,832.40x = 8,906,043,262.32
  5. Step 5: Solve for x
    x = 8,906,043,262.32/103,832.40
  6. Step 6: Final answer
    x = 85,773.26

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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.