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Finding the Fourth Proportional to 98,990.22, 136,574.37 and 55,965.54

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Solution

The fourth proportional to 98,990.22, 136,574.37 and 55,965.54 is: 77,214.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,990.22 : 136,574.37 = 55,965.54 : x
  2. Step 2: Convert to fraction form
    98,990.22/136,574.37 = 55,965.54/x
  3. Step 3: Cross multiply
    98,990.22x = 136,574.37 × 55,965.54
  4. Step 4: Simplify right side
    98,990.22x = 7,643,458,367.21
  5. Step 5: Solve for x
    x = 7,643,458,367.21/98,990.22
  6. Step 6: Final answer
    x = 77,214.28

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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.