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Finding the Fourth Proportional to 65,797.11, 90,693.37 and 51,431.56

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Solution

The fourth proportional to 65,797.11, 90,693.37 and 51,431.56 is: 70,892.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,797.11 : 90,693.37 = 51,431.56 : x
  2. Step 2: Convert to fraction form
    65,797.11/90,693.37 = 51,431.56/x
  3. Step 3: Cross multiply
    65,797.11x = 90,693.37 × 51,431.56
  4. Step 4: Simplify right side
    65,797.11x = 4,664,501,338.31
  5. Step 5: Solve for x
    x = 4,664,501,338.31/65,797.11
  6. Step 6: Final answer
    x = 70,892.19

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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.