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Finding the Fourth Proportional to 66,570.91, 99,858.42 and 29,111.70

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Solution

The fourth proportional to 66,570.91, 99,858.42 and 29,111.70 is: 43,668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,570.91 : 99,858.42 = 29,111.70 : x
  2. Step 2: Convert to fraction form
    66,570.91/99,858.42 = 29,111.70/x
  3. Step 3: Cross multiply
    66,570.91x = 99,858.42 × 29,111.70
  4. Step 4: Simplify right side
    66,570.91x = 2,907,048,739.98
  5. Step 5: Solve for x
    x = 2,907,048,739.98/66,570.91
  6. Step 6: Final answer
    x = 43,668.45

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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.