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Finding the Fourth Proportional to 318,435.95, 477,658.80 and 81,773.39

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Solution

The fourth proportional to 318,435.95, 477,658.80 and 81,773.39 is: 122,661.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,435.95 : 477,658.80 = 81,773.39 : x
  2. Step 2: Convert to fraction form
    318,435.95/477,658.80 = 81,773.39/x
  3. Step 3: Cross multiply
    318,435.95x = 477,658.80 × 81,773.39
  4. Step 4: Simplify right side
    318,435.95x = 39,059,779,339.33
  5. Step 5: Solve for x
    x = 39,059,779,339.33/318,435.95
  6. Step 6: Final answer
    x = 122,661.34

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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.