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Finding the Fourth Proportional to 192,153.80, 288,317.10 and 86,918.60

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Solution

The fourth proportional to 192,153.80, 288,317.10 and 86,918.60 is: 130,416.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,153.80 : 288,317.10 = 86,918.60 : x
  2. Step 2: Convert to fraction form
    192,153.80/288,317.10 = 86,918.60/x
  3. Step 3: Cross multiply
    192,153.80x = 288,317.10 × 86,918.60
  4. Step 4: Simplify right side
    192,153.80x = 25,060,118,688.06
  5. Step 5: Solve for x
    x = 25,060,118,688.06/192,153.80
  6. Step 6: Final answer
    x = 130,416.98

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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.