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Finding the Fourth Proportional to 103,637.89, 155,439.44 and 28,765.64

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Solution

The fourth proportional to 103,637.89, 155,439.44 and 28,765.64 is: 43,143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,637.89 : 155,439.44 = 28,765.64 : x
  2. Step 2: Convert to fraction form
    103,637.89/155,439.44 = 28,765.64/x
  3. Step 3: Cross multiply
    103,637.89x = 155,439.44 × 28,765.64
  4. Step 4: Simplify right side
    103,637.89x = 4,471,315,044.76
  5. Step 5: Solve for x
    x = 4,471,315,044.76/103,637.89
  6. Step 6: Final answer
    x = 43,143.63

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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.