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Finding the Fourth Proportional to 72,160.80, 108,241.20 and 47,277.60

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Solution

The fourth proportional to 72,160.80, 108,241.20 and 47,277.60 is: 70,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,160.80 : 108,241.20 = 47,277.60 : x
  2. Step 2: Convert to fraction form
    72,160.80/108,241.20 = 47,277.60/x
  3. Step 3: Cross multiply
    72,160.80x = 108,241.20 × 47,277.60
  4. Step 4: Simplify right side
    72,160.80x = 5,117,384,157.12
  5. Step 5: Solve for x
    x = 5,117,384,157.12/72,160.80
  6. Step 6: Final answer
    x = 70,916.40

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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.