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Finding the Fourth Proportional to 61,218.23, 91,845.80 and 21,770.22

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Solution

The fourth proportional to 61,218.23, 91,845.80 and 21,770.22 is: 32,661.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,218.23 : 91,845.80 = 21,770.22 : x
  2. Step 2: Convert to fraction form
    61,218.23/91,845.80 = 21,770.22/x
  3. Step 3: Cross multiply
    61,218.23x = 91,845.80 × 21,770.22
  4. Step 4: Simplify right side
    61,218.23x = 1,999,503,072.65
  5. Step 5: Solve for x
    x = 1,999,503,072.65/61,218.23
  6. Step 6: Final answer
    x = 32,661.89

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1.5x scale

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.