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Finding the Fourth Proportional to 141,805.17, 195,690.60 and 78,141.60

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Solution

The fourth proportional to 141,805.17, 195,690.60 and 78,141.60 is: 107,835.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,805.17 : 195,690.60 = 78,141.60 : x
  2. Step 2: Convert to fraction form
    141,805.17/195,690.60 = 78,141.60/x
  3. Step 3: Cross multiply
    141,805.17x = 195,690.60 × 78,141.60
  4. Step 4: Simplify right side
    141,805.17x = 15,291,576,588.96
  5. Step 5: Solve for x
    x = 15,291,576,588.96/141,805.17
  6. Step 6: Final answer
    x = 107,835.11

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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.