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Finding the Fourth Proportional to 61,328.80, 91,993.17 and 19,775.80

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Solution

The fourth proportional to 61,328.80, 91,993.17 and 19,775.80 is: 29,663.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,328.80 : 91,993.17 = 19,775.80 : x
  2. Step 2: Convert to fraction form
    61,328.80/91,993.17 = 19,775.80/x
  3. Step 3: Cross multiply
    61,328.80x = 91,993.17 × 19,775.80
  4. Step 4: Simplify right side
    61,328.80x = 1,819,238,531.29
  5. Step 5: Solve for x
    x = 1,819,238,531.29/61,328.80
  6. Step 6: Final answer
    x = 29,663.69

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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.