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Finding the Fourth Proportional to 128,645.01, 193,085.19 and 65,508.75

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Solution

The fourth proportional to 128,645.01, 193,085.19 and 65,508.75 is: 98,323.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,645.01 : 193,085.19 = 65,508.75 : x
  2. Step 2: Convert to fraction form
    128,645.01/193,085.19 = 65,508.75/x
  3. Step 3: Cross multiply
    128,645.01x = 193,085.19 × 65,508.75
  4. Step 4: Simplify right side
    128,645.01x = 12,648,769,440.41
  5. Step 5: Solve for x
    x = 12,648,769,440.41/128,645.01
  6. Step 6: Final answer
    x = 98,323.05

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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.