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Finding the Fourth Proportional to 103,173.60, 155,110.32 and 82,379.28

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Solution

The fourth proportional to 103,173.60, 155,110.32 and 82,379.28 is: 123,848.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,173.60 : 155,110.32 = 82,379.28 : x
  2. Step 2: Convert to fraction form
    103,173.60/155,110.32 = 82,379.28/x
  3. Step 3: Cross multiply
    103,173.60x = 155,110.32 × 82,379.28
  4. Step 4: Simplify right side
    103,173.60x = 12,777,876,482.17
  5. Step 5: Solve for x
    x = 12,777,876,482.17/103,173.60
  6. Step 6: Final answer
    x = 123,848.31

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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.