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Finding the Fourth Proportional to 66,640.04, 91,967.28 and 38,345.12

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Solution

The fourth proportional to 66,640.04, 91,967.28 and 38,345.12 is: 52,918.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.04 : 91,967.28 = 38,345.12 : x
  2. Step 2: Convert to fraction form
    66,640.04/91,967.28 = 38,345.12/x
  3. Step 3: Cross multiply
    66,640.04x = 91,967.28 × 38,345.12
  4. Step 4: Simplify right side
    66,640.04x = 3,526,496,387.67
  5. Step 5: Solve for x
    x = 3,526,496,387.67/66,640.04
  6. Step 6: Final answer
    x = 52,918.58

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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.