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Finding the Fourth Proportional to 318,496.01, 477,760.76 and 81,840.29

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Solution

The fourth proportional to 318,496.01, 477,760.76 and 81,840.29 is: 122,764.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,496.01 : 477,760.76 = 81,840.29 : x
  2. Step 2: Convert to fraction form
    318,496.01/477,760.76 = 81,840.29/x
  3. Step 3: Cross multiply
    318,496.01x = 477,760.76 × 81,840.29
  4. Step 4: Simplify right side
    318,496.01x = 39,100,078,739.82
  5. Step 5: Solve for x
    x = 39,100,078,739.82/318,496.01
  6. Step 6: Final answer
    x = 122,764.74

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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.