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Finding the Fourth Proportional to 58,782.75, 81,133.10 and 38,641.48

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Solution

The fourth proportional to 58,782.75, 81,133.10 and 38,641.48 is: 53,333.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,782.75 : 81,133.10 = 38,641.48 : x
  2. Step 2: Convert to fraction form
    58,782.75/81,133.10 = 38,641.48/x
  3. Step 3: Cross multiply
    58,782.75x = 81,133.10 × 38,641.48
  4. Step 4: Simplify right side
    58,782.75x = 3,135,103,060.99
  5. Step 5: Solve for x
    x = 3,135,103,060.99/58,782.75
  6. Step 6: Final answer
    x = 53,333.73

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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.