Home / 138,915.90-208,293.39-122,309.28

Finding the Fourth Proportional to 138,915.90, 208,293.39 and 122,309.28

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Solution

The fourth proportional to 138,915.90, 208,293.39 and 122,309.28 is: 183,393.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,915.90 : 208,293.39 = 122,309.28 : x
  2. Step 2: Convert to fraction form
    138,915.90/208,293.39 = 122,309.28/x
  3. Step 3: Cross multiply
    138,915.90x = 208,293.39 × 122,309.28
  4. Step 4: Simplify right side
    138,915.90x = 25,476,214,559.66
  5. Step 5: Solve for x
    x = 25,476,214,559.66/138,915.90
  6. Step 6: Final answer
    x = 183,393.08

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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.