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Finding the Fourth Proportional to 127,298.70, 190,911.60 and 38,530.80

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Solution

The fourth proportional to 127,298.70, 190,911.60 and 38,530.80 is: 57,785.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,298.70 : 190,911.60 = 38,530.80 : x
  2. Step 2: Convert to fraction form
    127,298.70/190,911.60 = 38,530.80/x
  3. Step 3: Cross multiply
    127,298.70x = 190,911.60 × 38,530.80
  4. Step 4: Simplify right side
    127,298.70x = 7,355,976,677.28
  5. Step 5: Solve for x
    x = 7,355,976,677.28/127,298.70
  6. Step 6: Final answer
    x = 57,785.17

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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.