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Finding the Fourth Proportional to 58,687.20, 80,985.60 and 36,021.60

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Solution

The fourth proportional to 58,687.20, 80,985.60 and 36,021.60 is: 49,708.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,687.20 : 80,985.60 = 36,021.60 : x
  2. Step 2: Convert to fraction form
    58,687.20/80,985.60 = 36,021.60/x
  3. Step 3: Cross multiply
    58,687.20x = 80,985.60 × 36,021.60
  4. Step 4: Simplify right side
    58,687.20x = 2,917,230,888.96
  5. Step 5: Solve for x
    x = 2,917,230,888.96/58,687.20
  6. Step 6: Final answer
    x = 49,708.13

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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.