Home / 128,269.15-192,458.40-80,920.60

Finding the Fourth Proportional to 128,269.15, 192,458.40 and 80,920.60

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Solution

The fourth proportional to 128,269.15, 192,458.40 and 80,920.60 is: 121,415.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,269.15 : 192,458.40 = 80,920.60 : x
  2. Step 2: Convert to fraction form
    128,269.15/192,458.40 = 80,920.60/x
  3. Step 3: Cross multiply
    128,269.15x = 192,458.40 × 80,920.60
  4. Step 4: Simplify right side
    128,269.15x = 15,573,849,203.04
  5. Step 5: Solve for x
    x = 15,573,849,203.04/128,269.15
  6. Step 6: Final answer
    x = 121,415.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.