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Finding the Fourth Proportional to 127,863.70, 191,788.60 and 39,117.21

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Solution

The fourth proportional to 127,863.70, 191,788.60 and 39,117.21 is: 58,673.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,863.70 : 191,788.60 = 39,117.21 : x
  2. Step 2: Convert to fraction form
    127,863.70/191,788.60 = 39,117.21/x
  3. Step 3: Cross multiply
    127,863.70x = 191,788.60 × 39,117.21
  4. Step 4: Simplify right side
    127,863.70x = 7,502,234,941.81
  5. Step 5: Solve for x
    x = 7,502,234,941.81/127,863.70
  6. Step 6: Final answer
    x = 58,673.69

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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.