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Finding the Fourth Proportional to 193,491.93, 290,349.99 and 81,162.12

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Solution

The fourth proportional to 193,491.93, 290,349.99 and 81,162.12 is: 121,790.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,491.93 : 290,349.99 = 81,162.12 : x
  2. Step 2: Convert to fraction form
    193,491.93/290,349.99 = 81,162.12/x
  3. Step 3: Cross multiply
    193,491.93x = 290,349.99 × 81,162.12
  4. Step 4: Simplify right side
    193,491.93x = 23,565,420,730.38
  5. Step 5: Solve for x
    x = 23,565,420,730.38/193,491.93
  6. Step 6: Final answer
    x = 121,790.20

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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.