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Finding the Fourth Proportional to 66,412.72, 91,649.63 and 36,198.07

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Solution

The fourth proportional to 66,412.72, 91,649.63 and 36,198.07 is: 49,953.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,412.72 : 91,649.63 = 36,198.07 : x
  2. Step 2: Convert to fraction form
    66,412.72/91,649.63 = 36,198.07/x
  3. Step 3: Cross multiply
    66,412.72x = 91,649.63 × 36,198.07
  4. Step 4: Simplify right side
    66,412.72x = 3,317,539,312.10
  5. Step 5: Solve for x
    x = 3,317,539,312.10/66,412.72
  6. Step 6: Final answer
    x = 49,953.37

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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.