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Finding the Fourth Proportional to 190,431.68, 262,785.44 and 105,543.68

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Solution

The fourth proportional to 190,431.68, 262,785.44 and 105,543.68 is: 145,644.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,431.68 : 262,785.44 = 105,543.68 : x
  2. Step 2: Convert to fraction form
    190,431.68/262,785.44 = 105,543.68/x
  3. Step 3: Cross multiply
    190,431.68x = 262,785.44 × 105,543.68
  4. Step 4: Simplify right side
    190,431.68x = 27,735,342,388.02
  5. Step 5: Solve for x
    x = 27,735,342,388.02/190,431.68
  6. Step 6: Final answer
    x = 145,644.58

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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.