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Finding the Fourth Proportional to 181,509.80, 272,361.90 and 81,685.40

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Solution

The fourth proportional to 181,509.80, 272,361.90 and 81,685.40 is: 122,571.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,509.80 : 272,361.90 = 81,685.40 : x
  2. Step 2: Convert to fraction form
    181,509.80/272,361.90 = 81,685.40/x
  3. Step 3: Cross multiply
    181,509.80x = 272,361.90 × 81,685.40
  4. Step 4: Simplify right side
    181,509.80x = 22,247,990,746.26
  5. Step 5: Solve for x
    x = 22,247,990,746.26/181,509.80
  6. Step 6: Final answer
    x = 122,571.84

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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.