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Finding the Fourth Proportional to 103,662.21, 155,304.68 and 72,005.39

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Solution

The fourth proportional to 103,662.21, 155,304.68 and 72,005.39 is: 107,877.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,662.21 : 155,304.68 = 72,005.39 : x
  2. Step 2: Convert to fraction form
    103,662.21/155,304.68 = 72,005.39/x
  3. Step 3: Cross multiply
    103,662.21x = 155,304.68 × 72,005.39
  4. Step 4: Simplify right side
    103,662.21x = 11,182,774,052.23
  5. Step 5: Solve for x
    x = 11,182,774,052.23/103,662.21
  6. Step 6: Final answer
    x = 107,877.06

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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.