Home / 100,389.68-138,546.65-55,076.46

Finding the Fourth Proportional to 100,389.68, 138,546.65 and 55,076.46

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Solution

The fourth proportional to 100,389.68, 138,546.65 and 55,076.46 is: 76,010.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,389.68 : 138,546.65 = 55,076.46 : x
  2. Step 2: Convert to fraction form
    100,389.68/138,546.65 = 55,076.46/x
  3. Step 3: Cross multiply
    100,389.68x = 138,546.65 × 55,076.46
  4. Step 4: Simplify right side
    100,389.68x = 7,630,658,645.00
  5. Step 5: Solve for x
    x = 7,630,658,645.00/100,389.68
  6. Step 6: Final answer
    x = 76,010.39

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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.