Home / 100,988.90-139,358.31-55,664.37

Finding the Fourth Proportional to 100,988.90, 139,358.31 and 55,664.37

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Solution

The fourth proportional to 100,988.90, 139,358.31 and 55,664.37 is: 76,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,988.90 : 139,358.31 = 55,664.37 : x
  2. Step 2: Convert to fraction form
    100,988.90/139,358.31 = 55,664.37/x
  3. Step 3: Cross multiply
    100,988.90x = 139,358.31 × 55,664.37
  4. Step 4: Simplify right side
    100,988.90x = 7,757,292,530.41
  5. Step 5: Solve for x
    x = 7,757,292,530.41/100,988.90
  6. Step 6: Final answer
    x = 76,813.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.