Home / 190,640.19-263,115-105,784.59

Finding the Fourth Proportional to 190,640.19, 263,115 and 105,784.59

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Solution

The fourth proportional to 190,640.19, 263,115 and 105,784.59 is: 146,000.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,640.19 : 263,115 = 105,784.59 : x
  2. Step 2: Convert to fraction form
    190,640.19/263,115 = 105,784.59/x
  3. Step 3: Cross multiply
    190,640.19x = 263,115 × 105,784.59
  4. Step 4: Simplify right side
    190,640.19x = 27,833,512,397.85
  5. Step 5: Solve for x
    x = 27,833,512,397.85/190,640.19
  6. Step 6: Final answer
    x = 146,000.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.