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Finding the Fourth Proportional to 66,059.84, 91,156.56 and 39,197.72

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Solution

The fourth proportional to 66,059.84, 91,156.56 and 39,197.72 is: 54,089.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,059.84 : 91,156.56 = 39,197.72 : x
  2. Step 2: Convert to fraction form
    66,059.84/91,156.56 = 39,197.72/x
  3. Step 3: Cross multiply
    66,059.84x = 91,156.56 × 39,197.72
  4. Step 4: Simplify right side
    66,059.84x = 3,573,129,315.04
  5. Step 5: Solve for x
    x = 3,573,129,315.04/66,059.84
  6. Step 6: Final answer
    x = 54,089.28

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Double scale
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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.