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Finding the Fourth Proportional to 86,193.60, 128,998.80 and 86,193.60

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Solution

The fourth proportional to 86,193.60, 128,998.80 and 86,193.60 is: 128,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,193.60 : 128,998.80 = 86,193.60 : x
  2. Step 2: Convert to fraction form
    86,193.60/128,998.80 = 86,193.60/x
  3. Step 3: Cross multiply
    86,193.60x = 128,998.80 × 86,193.60
  4. Step 4: Simplify right side
    86,193.60x = 11,118,870,967.68
  5. Step 5: Solve for x
    x = 11,118,870,967.68/86,193.60
  6. Step 6: Final answer
    x = 128,998.80

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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.