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Finding the Fourth Proportional to 76,137.86, 105,070.47 and 41,212.49

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Solution

The fourth proportional to 76,137.86, 105,070.47 and 41,212.49 is: 56,873.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,137.86 : 105,070.47 = 41,212.49 : x
  2. Step 2: Convert to fraction form
    76,137.86/105,070.47 = 41,212.49/x
  3. Step 3: Cross multiply
    76,137.86x = 105,070.47 × 41,212.49
  4. Step 4: Simplify right side
    76,137.86x = 4,330,215,168.82
  5. Step 5: Solve for x
    x = 4,330,215,168.82/76,137.86
  6. Step 6: Final answer
    x = 56,873.35

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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.