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Finding the Fourth Proportional to 81,682.40, 122,523.60 and 74,165.60

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Solution

The fourth proportional to 81,682.40, 122,523.60 and 74,165.60 is: 111,248.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,682.40 : 122,523.60 = 74,165.60 : x
  2. Step 2: Convert to fraction form
    81,682.40/122,523.60 = 74,165.60/x
  3. Step 3: Cross multiply
    81,682.40x = 122,523.60 × 74,165.60
  4. Step 4: Simplify right side
    81,682.40x = 9,087,036,308.16
  5. Step 5: Solve for x
    x = 9,087,036,308.16/81,682.40
  6. Step 6: Final answer
    x = 111,248.40

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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.