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Finding the Fourth Proportional to 86,745.56, 119,699.25 and 49,019.81

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Solution

The fourth proportional to 86,745.56, 119,699.25 and 49,019.81 is: 67,641.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,745.56 : 119,699.25 = 49,019.81 : x
  2. Step 2: Convert to fraction form
    86,745.56/119,699.25 = 49,019.81/x
  3. Step 3: Cross multiply
    86,745.56x = 119,699.25 × 49,019.81
  4. Step 4: Simplify right side
    86,745.56x = 5,867,634,492.14
  5. Step 5: Solve for x
    x = 5,867,634,492.14/86,745.56
  6. Step 6: Final answer
    x = 67,641.90

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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.