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Finding the Fourth Proportional to 64,892.42, 97,338.02 and 20,519.20

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Solution

The fourth proportional to 64,892.42, 97,338.02 and 20,519.20 is: 30,778.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,892.42 : 97,338.02 = 20,519.20 : x
  2. Step 2: Convert to fraction form
    64,892.42/97,338.02 = 20,519.20/x
  3. Step 3: Cross multiply
    64,892.42x = 97,338.02 × 20,519.20
  4. Step 4: Simplify right side
    64,892.42x = 1,997,297,813.29
  5. Step 5: Solve for x
    x = 1,997,297,813.29/64,892.42
  6. Step 6: Final answer
    x = 30,778.60

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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.