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Finding the Fourth Proportional to 77,665.97, 116,485.95 and 21,511.73

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Solution

The fourth proportional to 77,665.97, 116,485.95 and 21,511.73 is: 32,264.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,665.97 : 116,485.95 = 21,511.73 : x
  2. Step 2: Convert to fraction form
    77,665.97/116,485.95 = 21,511.73/x
  3. Step 3: Cross multiply
    77,665.97x = 116,485.95 × 21,511.73
  4. Step 4: Simplify right side
    77,665.97x = 2,505,814,677.08
  5. Step 5: Solve for x
    x = 2,505,814,677.08/77,665.97
  6. Step 6: Final answer
    x = 32,264.00

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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.