Home / 138,786.25-208,185.14-40,290.25

Finding the Fourth Proportional to 138,786.25, 208,185.14 and 40,290.25

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Solution

The fourth proportional to 138,786.25, 208,185.14 and 40,290.25 is: 60,437.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,786.25 : 208,185.14 = 40,290.25 : x
  2. Step 2: Convert to fraction form
    138,786.25/208,185.14 = 40,290.25/x
  3. Step 3: Cross multiply
    138,786.25x = 208,185.14 × 40,290.25
  4. Step 4: Simplify right side
    138,786.25x = 8,387,831,336.89
  5. Step 5: Solve for x
    x = 8,387,831,336.89/138,786.25
  6. Step 6: Final answer
    x = 60,437.05

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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.