Home / 71,128.16-106,692.32-18,537.60

Finding the Fourth Proportional to 71,128.16, 106,692.32 and 18,537.60

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Solution

The fourth proportional to 71,128.16, 106,692.32 and 18,537.60 is: 27,806.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.16 : 106,692.32 = 18,537.60 : x
  2. Step 2: Convert to fraction form
    71,128.16/106,692.32 = 18,537.60/x
  3. Step 3: Cross multiply
    71,128.16x = 106,692.32 × 18,537.60
  4. Step 4: Simplify right side
    71,128.16x = 1,977,819,551.23
  5. Step 5: Solve for x
    x = 1,977,819,551.23/71,128.16
  6. Step 6: Final answer
    x = 27,806.42

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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.