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Finding the Fourth Proportional to 98,891.56, 136,483.56 and 55,879.96

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Solution

The fourth proportional to 98,891.56, 136,483.56 and 55,879.96 is: 77,121.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,891.56 : 136,483.56 = 55,879.96 : x
  2. Step 2: Convert to fraction form
    98,891.56/136,483.56 = 55,879.96/x
  3. Step 3: Cross multiply
    98,891.56x = 136,483.56 × 55,879.96
  4. Step 4: Simplify right side
    98,891.56x = 7,626,695,873.46
  5. Step 5: Solve for x
    x = 7,626,695,873.46/98,891.56
  6. Step 6: Final answer
    x = 77,121.81

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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.