Home / 85,137.40-127,719.60-28,982.80

Finding the Fourth Proportional to 85,137.40, 127,719.60 and 28,982.80

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Solution

The fourth proportional to 85,137.40, 127,719.60 and 28,982.80 is: 43,478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,137.40 : 127,719.60 = 28,982.80 : x
  2. Step 2: Convert to fraction form
    85,137.40/127,719.60 = 28,982.80/x
  3. Step 3: Cross multiply
    85,137.40x = 127,719.60 × 28,982.80
  4. Step 4: Simplify right side
    85,137.40x = 3,701,671,622.88
  5. Step 5: Solve for x
    x = 3,701,671,622.88/85,137.40
  6. Step 6: Final answer
    x = 43,478.80

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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.