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Finding the Fourth Proportional to 318,485.52, 477,731.93 and 108,139.86

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Solution

The fourth proportional to 318,485.52, 477,731.93 and 108,139.86 is: 162,211.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,485.52 : 477,731.93 = 108,139.86 : x
  2. Step 2: Convert to fraction form
    318,485.52/477,731.93 = 108,139.86/x
  3. Step 3: Cross multiply
    318,485.52x = 477,731.93 × 108,139.86
  4. Step 4: Simplify right side
    318,485.52x = 51,661,863,487.03
  5. Step 5: Solve for x
    x = 51,661,863,487.03/318,485.52
  6. Step 6: Final answer
    x = 162,211.03

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.