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Finding the Fourth Proportional to 66,561.42, 99,840.21 and 17,313.42

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Solution

The fourth proportional to 66,561.42, 99,840.21 and 17,313.42 is: 25,969.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561.42 : 99,840.21 = 17,313.42 : x
  2. Step 2: Convert to fraction form
    66,561.42/99,840.21 = 17,313.42/x
  3. Step 3: Cross multiply
    66,561.42x = 99,840.21 × 17,313.42
  4. Step 4: Simplify right side
    66,561.42x = 1,728,575,488.62
  5. Step 5: Solve for x
    x = 1,728,575,488.62/66,561.42
  6. Step 6: Final answer
    x = 25,969.63

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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.