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Finding the Fourth Proportional to 66,015.63, 99,021.80 and 19,268.91

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Solution

The fourth proportional to 66,015.63, 99,021.80 and 19,268.91 is: 28,902.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,015.63 : 99,021.80 = 19,268.91 : x
  2. Step 2: Convert to fraction form
    66,015.63/99,021.80 = 19,268.91/x
  3. Step 3: Cross multiply
    66,015.63x = 99,021.80 × 19,268.91
  4. Step 4: Simplify right side
    66,015.63x = 1,908,042,055.89
  5. Step 5: Solve for x
    x = 1,908,042,055.89/66,015.63
  6. Step 6: Final answer
    x = 28,902.88

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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.