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Finding the Fourth Proportional to 127,217.52, 190,826.28 and 42,978.06

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Solution

The fourth proportional to 127,217.52, 190,826.28 and 42,978.06 is: 64,467.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,217.52 : 190,826.28 = 42,978.06 : x
  2. Step 2: Convert to fraction form
    127,217.52/190,826.28 = 42,978.06/x
  3. Step 3: Cross multiply
    127,217.52x = 190,826.28 × 42,978.06
  4. Step 4: Simplify right side
    127,217.52x = 8,201,343,311.42
  5. Step 5: Solve for x
    x = 8,201,343,311.42/127,217.52
  6. Step 6: Final answer
    x = 64,467.09

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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.