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Finding the Fourth Proportional to 318,487.57, 477,731.39 and 81,830.26

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Solution

The fourth proportional to 318,487.57, 477,731.39 and 81,830.26 is: 122,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,487.57 : 477,731.39 = 81,830.26 : x
  2. Step 2: Convert to fraction form
    318,487.57/477,731.39 = 81,830.26/x
  3. Step 3: Cross multiply
    318,487.57x = 477,731.39 × 81,830.26
  4. Step 4: Simplify right side
    318,487.57x = 39,092,883,853.86
  5. Step 5: Solve for x
    x = 39,092,883,853.86/318,487.57
  6. Step 6: Final answer
    x = 122,745.40

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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.