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Finding the Fourth Proportional to 103,608.63, 155,421.42 and 43,654.44

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Solution

The fourth proportional to 103,608.63, 155,421.42 and 43,654.44 is: 65,485.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,608.63 : 155,421.42 = 43,654.44 : x
  2. Step 2: Convert to fraction form
    103,608.63/155,421.42 = 43,654.44/x
  3. Step 3: Cross multiply
    103,608.63x = 155,421.42 × 43,654.44
  4. Step 4: Simplify right side
    103,608.63x = 6,784,835,054.10
  5. Step 5: Solve for x
    x = 6,784,835,054.10/103,608.63
  6. Step 6: Final answer
    x = 65,485.23

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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.