Home / 100,435.67-138,596.54-55,112.51

Finding the Fourth Proportional to 100,435.67, 138,596.54 and 55,112.51

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Solution

The fourth proportional to 100,435.67, 138,596.54 and 55,112.51 is: 76,052.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,435.67 : 138,596.54 = 55,112.51 : x
  2. Step 2: Convert to fraction form
    100,435.67/138,596.54 = 55,112.51/x
  3. Step 3: Cross multiply
    100,435.67x = 138,596.54 × 55,112.51
  4. Step 4: Simplify right side
    100,435.67x = 7,638,402,921.15
  5. Step 5: Solve for x
    x = 7,638,402,921.15/100,435.67
  6. Step 6: Final answer
    x = 76,052.69

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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.