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Finding the Fourth Proportional to 101,894.15, 140,615.58 and 56,575.05

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Solution

The fourth proportional to 101,894.15, 140,615.58 and 56,575.05 is: 78,074.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,894.15 : 140,615.58 = 56,575.05 : x
  2. Step 2: Convert to fraction form
    101,894.15/140,615.58 = 56,575.05/x
  3. Step 3: Cross multiply
    101,894.15x = 140,615.58 × 56,575.05
  4. Step 4: Simplify right side
    101,894.15x = 7,955,333,469.28
  5. Step 5: Solve for x
    x = 7,955,333,469.28/101,894.15
  6. Step 6: Final answer
    x = 78,074.49

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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.