Home / 138,915.36-208,382.04-55,809.36

Finding the Fourth Proportional to 138,915.36, 208,382.04 and 55,809.36

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Solution

The fourth proportional to 138,915.36, 208,382.04 and 55,809.36 is: 83,717.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,915.36 : 208,382.04 = 55,809.36 : x
  2. Step 2: Convert to fraction form
    138,915.36/208,382.04 = 55,809.36/x
  3. Step 3: Cross multiply
    138,915.36x = 208,382.04 × 55,809.36
  4. Step 4: Simplify right side
    138,915.36x = 11,629,668,287.89
  5. Step 5: Solve for x
    x = 11,629,668,287.89/138,915.36
  6. Step 6: Final answer
    x = 83,717.66

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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.