Home / 100,529.51-138,734.27-55,208.72

Finding the Fourth Proportional to 100,529.51, 138,734.27 and 55,208.72

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Solution

The fourth proportional to 100,529.51, 138,734.27 and 55,208.72 is: 76,189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,529.51 : 138,734.27 = 55,208.72 : x
  2. Step 2: Convert to fraction form
    100,529.51/138,734.27 = 55,208.72/x
  3. Step 3: Cross multiply
    100,529.51x = 138,734.27 × 55,208.72
  4. Step 4: Simplify right side
    100,529.51x = 7,659,341,744.66
  5. Step 5: Solve for x
    x = 7,659,341,744.66/100,529.51
  6. Step 6: Final answer
    x = 76,189.99

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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.