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Finding the Fourth Proportional to 61,211.56, 91,808.70 and 19,653.16

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Solution

The fourth proportional to 61,211.56, 91,808.70 and 19,653.16 is: 29,476.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,211.56 : 91,808.70 = 19,653.16 : x
  2. Step 2: Convert to fraction form
    61,211.56/91,808.70 = 19,653.16/x
  3. Step 3: Cross multiply
    61,211.56x = 91,808.70 × 19,653.16
  4. Step 4: Simplify right side
    61,211.56x = 1,804,331,070.49
  5. Step 5: Solve for x
    x = 1,804,331,070.49/61,211.56
  6. Step 6: Final answer
    x = 29,476.97

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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.