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Finding the Fourth Proportional to 127,726.80, 191,590.20 and 118,978.80

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Solution

The fourth proportional to 127,726.80, 191,590.20 and 118,978.80 is: 178,468.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,726.80 : 191,590.20 = 118,978.80 : x
  2. Step 2: Convert to fraction form
    127,726.80/191,590.20 = 118,978.80/x
  3. Step 3: Cross multiply
    127,726.80x = 191,590.20 × 118,978.80
  4. Step 4: Simplify right side
    127,726.80x = 22,795,172,087.76
  5. Step 5: Solve for x
    x = 22,795,172,087.76/127,726.80
  6. Step 6: Final answer
    x = 178,468.20

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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.