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Finding the Fourth Proportional to 61,211.52, 91,818.72 and 19,658.88

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Solution

The fourth proportional to 61,211.52, 91,818.72 and 19,658.88 is: 29,488.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,211.52 : 91,818.72 = 19,658.88 : x
  2. Step 2: Convert to fraction form
    61,211.52/91,818.72 = 19,658.88/x
  3. Step 3: Cross multiply
    61,211.52x = 91,818.72 × 19,658.88
  4. Step 4: Simplify right side
    61,211.52x = 1,805,053,198.23
  5. Step 5: Solve for x
    x = 1,805,053,198.23/61,211.52
  6. Step 6: Final answer
    x = 29,488.78

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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.