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Finding the Fourth Proportional to 127,781.70, 191,672.55 and 57,797.70

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Solution

The fourth proportional to 127,781.70, 191,672.55 and 57,797.70 is: 86,696.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,781.70 : 191,672.55 = 57,797.70 : x
  2. Step 2: Convert to fraction form
    127,781.70/191,672.55 = 57,797.70/x
  3. Step 3: Cross multiply
    127,781.70x = 191,672.55 × 57,797.70
  4. Step 4: Simplify right side
    127,781.70x = 11,078,232,543.14
  5. Step 5: Solve for x
    x = 11,078,232,543.14/127,781.70
  6. Step 6: Final answer
    x = 86,696.55

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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.