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Finding the Fourth Proportional to 127,420.84, 190,834.62 and 122,991.40

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Solution

The fourth proportional to 127,420.84, 190,834.62 and 122,991.40 is: 184,200.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,420.84 : 190,834.62 = 122,991.40 : x
  2. Step 2: Convert to fraction form
    127,420.84/190,834.62 = 122,991.40/x
  3. Step 3: Cross multiply
    127,420.84x = 190,834.62 × 122,991.40
  4. Step 4: Simplify right side
    127,420.84x = 23,471,017,082.27
  5. Step 5: Solve for x
    x = 23,471,017,082.27/127,420.84
  6. Step 6: Final answer
    x = 184,200.77

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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.