Home / 128,684.22-177,625.35-80,308.86

Finding the Fourth Proportional to 128,684.22, 177,625.35 and 80,308.86

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Solution

The fourth proportional to 128,684.22, 177,625.35 and 80,308.86 is: 110,851.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,684.22 : 177,625.35 = 80,308.86 : x
  2. Step 2: Convert to fraction form
    128,684.22/177,625.35 = 80,308.86/x
  3. Step 3: Cross multiply
    128,684.22x = 177,625.35 × 80,308.86
  4. Step 4: Simplify right side
    128,684.22x = 14,264,889,365.60
  5. Step 5: Solve for x
    x = 14,264,889,365.60/128,684.22
  6. Step 6: Final answer
    x = 110,851.89

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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.