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Finding the Fourth Proportional to 66,161.88, 91,269.18 and 40,967.64

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Solution

The fourth proportional to 66,161.88, 91,269.18 and 40,967.64 is: 56,514.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,161.88 : 91,269.18 = 40,967.64 : x
  2. Step 2: Convert to fraction form
    66,161.88/91,269.18 = 40,967.64/x
  3. Step 3: Cross multiply
    66,161.88x = 91,269.18 × 40,967.64
  4. Step 4: Simplify right side
    66,161.88x = 3,739,082,909.34
  5. Step 5: Solve for x
    x = 3,739,082,909.34/66,161.88
  6. Step 6: Final answer
    x = 56,514.16

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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.