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Finding the Fourth Proportional to 141,695.40, 195,540.90 and 78,035.40

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Solution

The fourth proportional to 141,695.40, 195,540.90 and 78,035.40 is: 107,689.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,695.40 : 195,540.90 = 78,035.40 : x
  2. Step 2: Convert to fraction form
    141,695.40/195,540.90 = 78,035.40/x
  3. Step 3: Cross multiply
    141,695.40x = 195,540.90 × 78,035.40
  4. Step 4: Simplify right side
    141,695.40x = 15,259,112,347.86
  5. Step 5: Solve for x
    x = 15,259,112,347.86/141,695.40
  6. Step 6: Final answer
    x = 107,689.54

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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.