Home / 128,650.25-177,542.99-71,289.43

Finding the Fourth Proportional to 128,650.25, 177,542.99 and 71,289.43

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Solution

The fourth proportional to 128,650.25, 177,542.99 and 71,289.43 is: 98,382.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,650.25 : 177,542.99 = 71,289.43 : x
  2. Step 2: Convert to fraction form
    128,650.25/177,542.99 = 71,289.43/x
  3. Step 3: Cross multiply
    128,650.25x = 177,542.99 × 71,289.43
  4. Step 4: Simplify right side
    128,650.25x = 12,656,938,024.63
  5. Step 5: Solve for x
    x = 12,656,938,024.63/128,650.25
  6. Step 6: Final answer
    x = 98,382.54

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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.