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Finding the Fourth Proportional to 74,170.53, 111,258.86 and 21,580.01

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Solution

The fourth proportional to 74,170.53, 111,258.86 and 21,580.01 is: 32,370.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,170.53 : 111,258.86 = 21,580.01 : x
  2. Step 2: Convert to fraction form
    74,170.53/111,258.86 = 21,580.01/x
  3. Step 3: Cross multiply
    74,170.53x = 111,258.86 × 21,580.01
  4. Step 4: Simplify right side
    74,170.53x = 2,400,967,311.39
  5. Step 5: Solve for x
    x = 2,400,967,311.39/74,170.53
  6. Step 6: Final answer
    x = 32,370.91

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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.