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Finding the Fourth Proportional to 72,901.74, 100,586.70 and 41,070.60

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Solution

The fourth proportional to 72,901.74, 100,586.70 and 41,070.60 is: 56,667.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,901.74 : 100,586.70 = 41,070.60 : x
  2. Step 2: Convert to fraction form
    72,901.74/100,586.70 = 41,070.60/x
  3. Step 3: Cross multiply
    72,901.74x = 100,586.70 × 41,070.60
  4. Step 4: Simplify right side
    72,901.74x = 4,131,156,121.02
  5. Step 5: Solve for x
    x = 4,131,156,121.02/72,901.74
  6. Step 6: Final answer
    x = 56,667.46

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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.