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Finding the Fourth Proportional to 65,697.40, 98,570.40 and 21,325.60

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Solution

The fourth proportional to 65,697.40, 98,570.40 and 21,325.60 is: 31,996.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,697.40 : 98,570.40 = 21,325.60 : x
  2. Step 2: Convert to fraction form
    65,697.40/98,570.40 = 21,325.60/x
  3. Step 3: Cross multiply
    65,697.40x = 98,570.40 × 21,325.60
  4. Step 4: Simplify right side
    65,697.40x = 2,102,072,922.24
  5. Step 5: Solve for x
    x = 2,102,072,922.24/65,697.40
  6. Step 6: Final answer
    x = 31,996.29

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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.