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Finding the Fourth Proportional to 114,411.20, 171,616.80 and 77,086.40

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Solution

The fourth proportional to 114,411.20, 171,616.80 and 77,086.40 is: 115,629.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,411.20 : 171,616.80 = 77,086.40 : x
  2. Step 2: Convert to fraction form
    114,411.20/171,616.80 = 77,086.40/x
  3. Step 3: Cross multiply
    114,411.20x = 171,616.80 × 77,086.40
  4. Step 4: Simplify right side
    114,411.20x = 13,229,321,291.52
  5. Step 5: Solve for x
    x = 13,229,321,291.52/114,411.20
  6. Step 6: Final answer
    x = 115,629.60

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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.