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Finding the Fourth Proportional to 66,042.87, 99,079.41 and 28,609.17

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Solution

The fourth proportional to 66,042.87, 99,079.41 and 28,609.17 is: 42,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,042.87 : 99,079.41 = 28,609.17 : x
  2. Step 2: Convert to fraction form
    66,042.87/99,079.41 = 28,609.17/x
  3. Step 3: Cross multiply
    66,042.87x = 99,079.41 × 28,609.17
  4. Step 4: Simplify right side
    66,042.87x = 2,834,579,684.19
  5. Step 5: Solve for x
    x = 2,834,579,684.19/66,042.87
  6. Step 6: Final answer
    x = 42,920.30

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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.