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Finding the Fourth Proportional to 57,109.84, 85,664.76 and 19,670.84

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Solution

The fourth proportional to 57,109.84, 85,664.76 and 19,670.84 is: 29,506.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,109.84 : 85,664.76 = 19,670.84 : x
  2. Step 2: Convert to fraction form
    57,109.84/85,664.76 = 19,670.84/x
  3. Step 3: Cross multiply
    57,109.84x = 85,664.76 × 19,670.84
  4. Step 4: Simplify right side
    57,109.84x = 1,685,097,787.60
  5. Step 5: Solve for x
    x = 1,685,097,787.60/57,109.84
  6. Step 6: Final answer
    x = 29,506.26

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1.5x scale

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.