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Finding the Fourth Proportional to 66,005.40, 99,006.42 and 19,258.68

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Solution

The fourth proportional to 66,005.40, 99,006.42 and 19,258.68 is: 28,887.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,005.40 : 99,006.42 = 19,258.68 : x
  2. Step 2: Convert to fraction form
    66,005.40/99,006.42 = 19,258.68/x
  3. Step 3: Cross multiply
    66,005.40x = 99,006.42 × 19,258.68
  4. Step 4: Simplify right side
    66,005.40x = 1,906,732,960.73
  5. Step 5: Solve for x
    x = 1,906,732,960.73/66,005.40
  6. Step 6: Final answer
    x = 28,887.53

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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.