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Finding the Fourth Proportional to 128,990.83, 193,471.65 and 44,735.44

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Solution

The fourth proportional to 128,990.83, 193,471.65 and 44,735.44 is: 67,098.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,990.83 : 193,471.65 = 44,735.44 : x
  2. Step 2: Convert to fraction form
    128,990.83/193,471.65 = 44,735.44/x
  3. Step 3: Cross multiply
    128,990.83x = 193,471.65 × 44,735.44
  4. Step 4: Simplify right side
    128,990.83x = 8,655,039,390.28
  5. Step 5: Solve for x
    x = 8,655,039,390.28/128,990.83
  6. Step 6: Final answer
    x = 67,098.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.