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Finding the Fourth Proportional to 64,763.78, 97,149.12 and 20,393.99

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Solution

The fourth proportional to 64,763.78, 97,149.12 and 20,393.99 is: 30,592.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,763.78 : 97,149.12 = 20,393.99 : x
  2. Step 2: Convert to fraction form
    64,763.78/97,149.12 = 20,393.99/x
  3. Step 3: Cross multiply
    64,763.78x = 97,149.12 × 20,393.99
  4. Step 4: Simplify right side
    64,763.78x = 1,981,257,696.04
  5. Step 5: Solve for x
    x = 1,981,257,696.04/64,763.78
  6. Step 6: Final answer
    x = 30,592.07

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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.