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Finding the Fourth Proportional to 64,986.60, 89,644.08 and 39,127.17

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Solution

The fourth proportional to 64,986.60, 89,644.08 and 39,127.17 is: 53,972.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,986.60 : 89,644.08 = 39,127.17 : x
  2. Step 2: Convert to fraction form
    64,986.60/89,644.08 = 39,127.17/x
  3. Step 3: Cross multiply
    64,986.60x = 89,644.08 × 39,127.17
  4. Step 4: Simplify right side
    64,986.60x = 3,507,519,136.30
  5. Step 5: Solve for x
    x = 3,507,519,136.30/64,986.60
  6. Step 6: Final answer
    x = 53,972.96

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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.