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Finding the Fourth Proportional to 190,605.68, 285,799.12 and 72,201.50

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Solution

The fourth proportional to 190,605.68, 285,799.12 and 72,201.50 is: 108,260.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,605.68 : 285,799.12 = 72,201.50 : x
  2. Step 2: Convert to fraction form
    190,605.68/285,799.12 = 72,201.50/x
  3. Step 3: Cross multiply
    190,605.68x = 285,799.12 × 72,201.50
  4. Step 4: Simplify right side
    190,605.68x = 20,635,125,162.68
  5. Step 5: Solve for x
    x = 20,635,125,162.68/190,605.68
  6. Step 6: Final answer
    x = 108,260.81

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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.