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Finding the Fourth Proportional to 103,662.06, 155,490.21 and 72,517.74

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Solution

The fourth proportional to 103,662.06, 155,490.21 and 72,517.74 is: 108,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,662.06 : 155,490.21 = 72,517.74 : x
  2. Step 2: Convert to fraction form
    103,662.06/155,490.21 = 72,517.74/x
  3. Step 3: Cross multiply
    103,662.06x = 155,490.21 × 72,517.74
  4. Step 4: Simplify right side
    103,662.06x = 11,275,798,621.33
  5. Step 5: Solve for x
    x = 11,275,798,621.33/103,662.06
  6. Step 6: Final answer
    x = 108,774.60

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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.