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Finding the Fourth Proportional to 66,609.83, 99,901.77 and 19,221.59

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Solution

The fourth proportional to 66,609.83, 99,901.77 and 19,221.59 is: 28,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609.83 : 99,901.77 = 19,221.59 : x
  2. Step 2: Convert to fraction form
    66,609.83/99,901.77 = 19,221.59/x
  3. Step 3: Cross multiply
    66,609.83x = 99,901.77 × 19,221.59
  4. Step 4: Simplify right side
    66,609.83x = 1,920,270,363.71
  5. Step 5: Solve for x
    x = 1,920,270,363.71/66,609.83
  6. Step 6: Final answer
    x = 28,828.64

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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.