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Finding the Fourth Proportional to 64,899.40, 97,363.74 and 20,528.84

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Solution

The fourth proportional to 64,899.40, 97,363.74 and 20,528.84 is: 30,797.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,899.40 : 97,363.74 = 20,528.84 : x
  2. Step 2: Convert to fraction form
    64,899.40/97,363.74 = 20,528.84/x
  3. Step 3: Cross multiply
    64,899.40x = 97,363.74 × 20,528.84
  4. Step 4: Simplify right side
    64,899.40x = 1,998,764,640.26
  5. Step 5: Solve for x
    x = 1,998,764,640.26/64,899.40
  6. Step 6: Final answer
    x = 30,797.89

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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.