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Finding the Fourth Proportional to 132,940.40, 199,410.60 and 85,701.20

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Solution

The fourth proportional to 132,940.40, 199,410.60 and 85,701.20 is: 128,551.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,940.40 : 199,410.60 = 85,701.20 : x
  2. Step 2: Convert to fraction form
    132,940.40/199,410.60 = 85,701.20/x
  3. Step 3: Cross multiply
    132,940.40x = 199,410.60 × 85,701.20
  4. Step 4: Simplify right side
    132,940.40x = 17,089,727,712.72
  5. Step 5: Solve for x
    x = 17,089,727,712.72/132,940.40
  6. Step 6: Final answer
    x = 128,551.80

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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.