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Finding the Fourth Proportional to 98,240.44, 135,561.90 and 55,790.68

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Solution

The fourth proportional to 98,240.44, 135,561.90 and 55,790.68 is: 76,985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,240.44 : 135,561.90 = 55,790.68 : x
  2. Step 2: Convert to fraction form
    98,240.44/135,561.90 = 55,790.68/x
  3. Step 3: Cross multiply
    98,240.44x = 135,561.90 × 55,790.68
  4. Step 4: Simplify right side
    98,240.44x = 7,563,090,583.09
  5. Step 5: Solve for x
    x = 7,563,090,583.09/98,240.44
  6. Step 6: Final answer
    x = 76,985.51

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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.