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Finding the Fourth Proportional to 51,681.84, 77,520.72 and 14,745.84

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Solution

The fourth proportional to 51,681.84, 77,520.72 and 14,745.84 is: 22,118.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,681.84 : 77,520.72 = 14,745.84 : x
  2. Step 2: Convert to fraction form
    51,681.84/77,520.72 = 14,745.84/x
  3. Step 3: Cross multiply
    51,681.84x = 77,520.72 × 14,745.84
  4. Step 4: Simplify right side
    51,681.84x = 1,143,108,133.80
  5. Step 5: Solve for x
    x = 1,143,108,133.80/51,681.84
  6. Step 6: Final answer
    x = 22,118.18

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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.