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Finding the Fourth Proportional to 113,448, 170,249.76 and 39,576

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Solution

The fourth proportional to 113,448, 170,249.76 and 39,576 is: 59,391.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,448 : 170,249.76 = 39,576 : x
  2. Step 2: Convert to fraction form
    113,448/170,249.76 = 39,576/x
  3. Step 3: Cross multiply
    113,448x = 170,249.76 × 39,576
  4. Step 4: Simplify right side
    113,448x = 6,737,804,501.76
  5. Step 5: Solve for x
    x = 6,737,804,501.76/113,448
  6. Step 6: Final answer
    x = 59,391.13

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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.