Home / 128,824.22-177,777.48-78,523.22

Finding the Fourth Proportional to 128,824.22, 177,777.48 and 78,523.22

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Solution

The fourth proportional to 128,824.22, 177,777.48 and 78,523.22 is: 108,362.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,824.22 : 177,777.48 = 78,523.22 : x
  2. Step 2: Convert to fraction form
    128,824.22/177,777.48 = 78,523.22/x
  3. Step 3: Cross multiply
    128,824.22x = 177,777.48 × 78,523.22
  4. Step 4: Simplify right side
    128,824.22x = 13,959,660,911.99
  5. Step 5: Solve for x
    x = 13,959,660,911.99/128,824.22
  6. Step 6: Final answer
    x = 108,362.08

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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.