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Finding the Fourth Proportional to 66,161.84, 91,036.56 and 64,587.20

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Solution

The fourth proportional to 66,161.84, 91,036.56 and 64,587.20 is: 88,869.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,161.84 : 91,036.56 = 64,587.20 : x
  2. Step 2: Convert to fraction form
    66,161.84/91,036.56 = 64,587.20/x
  3. Step 3: Cross multiply
    66,161.84x = 91,036.56 × 64,587.20
  4. Step 4: Simplify right side
    66,161.84x = 5,879,796,508.03
  5. Step 5: Solve for x
    x = 5,879,796,508.03/66,161.84
  6. Step 6: Final answer
    x = 88,869.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.