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Finding the Fourth Proportional to 70,558.85, 105,783.93 and 61,185.98

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Solution

The fourth proportional to 70,558.85, 105,783.93 and 61,185.98 is: 91,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,558.85 : 105,783.93 = 61,185.98 : x
  2. Step 2: Convert to fraction form
    70,558.85/105,783.93 = 61,185.98/x
  3. Step 3: Cross multiply
    70,558.85x = 105,783.93 × 61,185.98
  4. Step 4: Simplify right side
    70,558.85x = 6,472,492,896.38
  5. Step 5: Solve for x
    x = 6,472,492,896.38/70,558.85
  6. Step 6: Final answer
    x = 91,731.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.