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Finding the Fourth Proportional to 61,899.90, 85,421.60 and 33,605.58

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Solution

The fourth proportional to 61,899.90, 85,421.60 and 33,605.58 is: 46,375.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,899.90 : 85,421.60 = 33,605.58 : x
  2. Step 2: Convert to fraction form
    61,899.90/85,421.60 = 33,605.58/x
  3. Step 3: Cross multiply
    61,899.90x = 85,421.60 × 33,605.58
  4. Step 4: Simplify right side
    61,899.90x = 2,870,642,412.53
  5. Step 5: Solve for x
    x = 2,870,642,412.53/61,899.90
  6. Step 6: Final answer
    x = 46,375.56

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1.5x scale

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.