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Finding the Fourth Proportional to 61,900.32, 85,421.94 and 33,605.40

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Solution

The fourth proportional to 61,900.32, 85,421.94 and 33,605.40 is: 46,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,900.32 : 85,421.94 = 33,605.40 : x
  2. Step 2: Convert to fraction form
    61,900.32/85,421.94 = 33,605.40/x
  3. Step 3: Cross multiply
    61,900.32x = 85,421.94 × 33,605.40
  4. Step 4: Simplify right side
    61,900.32x = 2,870,638,462.48
  5. Step 5: Solve for x
    x = 2,870,638,462.48/61,900.32
  6. Step 6: Final answer
    x = 46,375.18

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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.