Home / 100,435.71-138,596.64-55,112.58

Finding the Fourth Proportional to 100,435.71, 138,596.64 and 55,112.58

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Solution

The fourth proportional to 100,435.71, 138,596.64 and 55,112.58 is: 76,052.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,435.71 : 138,596.64 = 55,112.58 : x
  2. Step 2: Convert to fraction form
    100,435.71/138,596.64 = 55,112.58/x
  3. Step 3: Cross multiply
    100,435.71x = 138,596.64 × 55,112.58
  4. Step 4: Simplify right side
    100,435.71x = 7,638,418,409.73
  5. Step 5: Solve for x
    x = 7,638,418,409.73/100,435.71
  6. Step 6: Final answer
    x = 76,052.81

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1.5x scale

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.