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Finding the Fourth Proportional to 318,168.60, 477,241.92 and 81,513.60

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Solution

The fourth proportional to 318,168.60, 477,241.92 and 81,513.60 is: 122,267.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,168.60 : 477,241.92 = 81,513.60 : x
  2. Step 2: Convert to fraction form
    318,168.60/477,241.92 = 81,513.60/x
  3. Step 3: Cross multiply
    318,168.60x = 477,241.92 × 81,513.60
  4. Step 4: Simplify right side
    318,168.60x = 38,901,706,970.11
  5. Step 5: Solve for x
    x = 38,901,706,970.11/318,168.60
  6. Step 6: Final answer
    x = 122,267.59

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1.5x scale

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.