Home / 138,918.80-208,356.60-39,069.20

Finding the Fourth Proportional to 138,918.80, 208,356.60 and 39,069.20

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Solution

The fourth proportional to 138,918.80, 208,356.60 and 39,069.20 is: 58,597.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,918.80 : 208,356.60 = 39,069.20 : x
  2. Step 2: Convert to fraction form
    138,918.80/208,356.60 = 39,069.20/x
  3. Step 3: Cross multiply
    138,918.80x = 208,356.60 × 39,069.20
  4. Step 4: Simplify right side
    138,918.80x = 8,140,325,676.72
  5. Step 5: Solve for x
    x = 8,140,325,676.72/138,918.80
  6. Step 6: Final answer
    x = 58,597.73

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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.