Home / 100,608.12-138,842.71-55,290.24

Finding the Fourth Proportional to 100,608.12, 138,842.71 and 55,290.24

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Solution

The fourth proportional to 100,608.12, 138,842.71 and 55,290.24 is: 76,302.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.12 : 138,842.71 = 55,290.24 : x
  2. Step 2: Convert to fraction form
    100,608.12/138,842.71 = 55,290.24/x
  3. Step 3: Cross multiply
    100,608.12x = 138,842.71 × 55,290.24
  4. Step 4: Simplify right side
    100,608.12x = 7,676,646,619.92
  5. Step 5: Solve for x
    x = 7,676,646,619.92/100,608.12
  6. Step 6: Final answer
    x = 76,302.46

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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.