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Finding the Fourth Proportional to 105,745.95, 145,879.11 and 63,296.28

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Solution

The fourth proportional to 105,745.95, 145,879.11 and 63,296.28 is: 87,318.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,745.95 : 145,879.11 = 63,296.28 : x
  2. Step 2: Convert to fraction form
    105,745.95/145,879.11 = 63,296.28/x
  3. Step 3: Cross multiply
    105,745.95x = 145,879.11 × 63,296.28
  4. Step 4: Simplify right side
    105,745.95x = 9,233,604,992.71
  5. Step 5: Solve for x
    x = 9,233,604,992.71/105,745.95
  6. Step 6: Final answer
    x = 87,318.76

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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.