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Finding the Fourth Proportional to 103,718.60, 155,189.10 and 68,726.60

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Solution

The fourth proportional to 103,718.60, 155,189.10 and 68,726.60 is: 102,832.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,718.60 : 155,189.10 = 68,726.60 : x
  2. Step 2: Convert to fraction form
    103,718.60/155,189.10 = 68,726.60/x
  3. Step 3: Cross multiply
    103,718.60x = 155,189.10 × 68,726.60
  4. Step 4: Simplify right side
    103,718.60x = 10,665,619,200.06
  5. Step 5: Solve for x
    x = 10,665,619,200.06/103,718.60
  6. Step 6: Final answer
    x = 102,832.27

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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.