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Finding the Fourth Proportional to 127,515.80, 191,273.70 and 105,354.20

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Solution

The fourth proportional to 127,515.80, 191,273.70 and 105,354.20 is: 158,031.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,515.80 : 191,273.70 = 105,354.20 : x
  2. Step 2: Convert to fraction form
    127,515.80/191,273.70 = 105,354.20/x
  3. Step 3: Cross multiply
    127,515.80x = 191,273.70 × 105,354.20
  4. Step 4: Simplify right side
    127,515.80x = 20,151,487,644.54
  5. Step 5: Solve for x
    x = 20,151,487,644.54/127,515.80
  6. Step 6: Final answer
    x = 158,031.30

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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.