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Finding the Fourth Proportional to 92,808.48, 128,017.44 and 55,056

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Solution

The fourth proportional to 92,808.48, 128,017.44 and 55,056 is: 75,942.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,808.48 : 128,017.44 = 55,056 : x
  2. Step 2: Convert to fraction form
    92,808.48/128,017.44 = 55,056/x
  3. Step 3: Cross multiply
    92,808.48x = 128,017.44 × 55,056
  4. Step 4: Simplify right side
    92,808.48x = 7,048,128,176.64
  5. Step 5: Solve for x
    x = 7,048,128,176.64/92,808.48
  6. Step 6: Final answer
    x = 75,942.72

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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.