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Finding the Fourth Proportional to 66,145.44, 99,086.94 and 30,978.48

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Solution

The fourth proportional to 66,145.44, 99,086.94 and 30,978.48 is: 46,406.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,145.44 : 99,086.94 = 30,978.48 : x
  2. Step 2: Convert to fraction form
    66,145.44/99,086.94 = 30,978.48/x
  3. Step 3: Cross multiply
    66,145.44x = 99,086.94 × 30,978.48
  4. Step 4: Simplify right side
    66,145.44x = 3,069,562,789.05
  5. Step 5: Solve for x
    x = 3,069,562,789.05/66,145.44
  6. Step 6: Final answer
    x = 46,406.26

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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.