Home / 128,519.60-177,421.39-80,799.26

Finding the Fourth Proportional to 128,519.60, 177,421.39 and 80,799.26

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Solution

The fourth proportional to 128,519.60, 177,421.39 and 80,799.26 is: 111,543.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,519.60 : 177,421.39 = 80,799.26 : x
  2. Step 2: Convert to fraction form
    128,519.60/177,421.39 = 80,799.26/x
  3. Step 3: Cross multiply
    128,519.60x = 177,421.39 × 80,799.26
  4. Step 4: Simplify right side
    128,519.60x = 14,335,515,931.07
  5. Step 5: Solve for x
    x = 14,335,515,931.07/128,519.60
  6. Step 6: Final answer
    x = 111,543.43

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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.