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Finding the Fourth Proportional to 318,008.44, 477,029 and 81,353.17

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Solution

The fourth proportional to 318,008.44, 477,029 and 81,353.17 is: 122,033.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,008.44 : 477,029 = 81,353.17 : x
  2. Step 2: Convert to fraction form
    318,008.44/477,029 = 81,353.17/x
  3. Step 3: Cross multiply
    318,008.44x = 477,029 × 81,353.17
  4. Step 4: Simplify right side
    318,008.44x = 38,807,821,331.93
  5. Step 5: Solve for x
    x = 38,807,821,331.93/318,008.44
  6. Step 6: Final answer
    x = 122,033.94

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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.