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Finding the Fourth Proportional to 61,186.93, 91,780.40 and 21,745.60

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Solution

The fourth proportional to 61,186.93, 91,780.40 and 21,745.60 is: 32,618.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,186.93 : 91,780.40 = 21,745.60 : x
  2. Step 2: Convert to fraction form
    61,186.93/91,780.40 = 21,745.60/x
  3. Step 3: Cross multiply
    61,186.93x = 91,780.40 × 21,745.60
  4. Step 4: Simplify right side
    61,186.93x = 1,995,819,866.24
  5. Step 5: Solve for x
    x = 1,995,819,866.24/61,186.93
  6. Step 6: Final answer
    x = 32,618.40

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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.