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Finding the Fourth Proportional to 64,930.96, 97,395.84 and 20,557.60

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Solution

The fourth proportional to 64,930.96, 97,395.84 and 20,557.60 is: 30,836.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,930.96 : 97,395.84 = 20,557.60 : x
  2. Step 2: Convert to fraction form
    64,930.96/97,395.84 = 20,557.60/x
  3. Step 3: Cross multiply
    64,930.96x = 97,395.84 × 20,557.60
  4. Step 4: Simplify right side
    64,930.96x = 2,002,224,720.38
  5. Step 5: Solve for x
    x = 2,002,224,720.38/64,930.96
  6. Step 6: Final answer
    x = 30,836.21

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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.