Home / 100,440.90-138,608.01-55,119.62

Finding the Fourth Proportional to 100,440.90, 138,608.01 and 55,119.62

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Solution

The fourth proportional to 100,440.90, 138,608.01 and 55,119.62 is: 76,064.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,440.90 : 138,608.01 = 55,119.62 : x
  2. Step 2: Convert to fraction form
    100,440.90/138,608.01 = 55,119.62/x
  3. Step 3: Cross multiply
    100,440.90x = 138,608.01 × 55,119.62
  4. Step 4: Simplify right side
    100,440.90x = 7,640,020,840.16
  5. Step 5: Solve for x
    x = 7,640,020,840.16/100,440.90
  6. Step 6: Final answer
    x = 76,064.84

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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.