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Finding the Fourth Proportional to 65,389.95, 89,954.97 and 57,287.11

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Solution

The fourth proportional to 65,389.95, 89,954.97 and 57,287.11 is: 78,808.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,389.95 : 89,954.97 = 57,287.11 : x
  2. Step 2: Convert to fraction form
    65,389.95/89,954.97 = 57,287.11/x
  3. Step 3: Cross multiply
    65,389.95x = 89,954.97 × 57,287.11
  4. Step 4: Simplify right side
    65,389.95x = 5,153,260,261.44
  5. Step 5: Solve for x
    x = 5,153,260,261.44/65,389.95
  6. Step 6: Final answer
    x = 78,808.14

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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.