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Finding the Fourth Proportional to 98,393.13, 135,790.83 and 80,437.86

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Solution

The fourth proportional to 98,393.13, 135,790.83 and 80,437.86 is: 111,011.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,393.13 : 135,790.83 = 80,437.86 : x
  2. Step 2: Convert to fraction form
    98,393.13/135,790.83 = 80,437.86/x
  3. Step 3: Cross multiply
    98,393.13x = 135,790.83 × 80,437.86
  4. Step 4: Simplify right side
    98,393.13x = 10,922,723,772.82
  5. Step 5: Solve for x
    x = 10,922,723,772.82/98,393.13
  6. Step 6: Final answer
    x = 111,011.04

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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.