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Finding the Fourth Proportional to 98,451.86, 135,855.44 and 55,435.28

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Solution

The fourth proportional to 98,451.86, 135,855.44 and 55,435.28 is: 76,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,451.86 : 135,855.44 = 55,435.28 : x
  2. Step 2: Convert to fraction form
    98,451.86/135,855.44 = 55,435.28/x
  3. Step 3: Cross multiply
    98,451.86x = 135,855.44 × 55,435.28
  4. Step 4: Simplify right side
    98,451.86x = 7,531,184,355.92
  5. Step 5: Solve for x
    x = 7,531,184,355.92/98,451.86
  6. Step 6: Final answer
    x = 76,496.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.