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Finding the Fourth Proportional to 47,275.99, 70,915.97 and 21,999.20

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Solution

The fourth proportional to 47,275.99, 70,915.97 and 21,999.20 is: 32,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,275.99 : 70,915.97 = 21,999.20 : x
  2. Step 2: Convert to fraction form
    47,275.99/70,915.97 = 21,999.20/x
  3. Step 3: Cross multiply
    47,275.99x = 70,915.97 × 21,999.20
  4. Step 4: Simplify right side
    47,275.99x = 1,560,094,307.64
  5. Step 5: Solve for x
    x = 1,560,094,307.64/47,275.99
  6. Step 6: Final answer
    x = 32,999.72

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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.