Home / 128,942.08-177,930.96-71,584.48

Finding the Fourth Proportional to 128,942.08, 177,930.96 and 71,584.48

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Solution

The fourth proportional to 128,942.08, 177,930.96 and 71,584.48 is: 98,781.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,942.08 : 177,930.96 = 71,584.48 : x
  2. Step 2: Convert to fraction form
    128,942.08/177,930.96 = 71,584.48/x
  3. Step 3: Cross multiply
    128,942.08x = 177,930.96 × 71,584.48
  4. Step 4: Simplify right side
    128,942.08x = 12,737,095,247.50
  5. Step 5: Solve for x
    x = 12,737,095,247.50/128,942.08
  6. Step 6: Final answer
    x = 98,781.52

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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.