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Finding the Fourth Proportional to 114,646.20, 171,969.30 and 86,652.60

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Solution

The fourth proportional to 114,646.20, 171,969.30 and 86,652.60 is: 129,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,646.20 : 171,969.30 = 86,652.60 : x
  2. Step 2: Convert to fraction form
    114,646.20/171,969.30 = 86,652.60/x
  3. Step 3: Cross multiply
    114,646.20x = 171,969.30 × 86,652.60
  4. Step 4: Simplify right side
    114,646.20x = 14,901,586,965.18
  5. Step 5: Solve for x
    x = 14,901,586,965.18/114,646.20
  6. Step 6: Final answer
    x = 129,978.90

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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.