Home / 128,941.80-177,936.78-71,577.73

Finding the Fourth Proportional to 128,941.80, 177,936.78 and 71,577.73

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Solution

The fourth proportional to 128,941.80, 177,936.78 and 71,577.73 is: 98,775.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,941.80 : 177,936.78 = 71,577.73 : x
  2. Step 2: Convert to fraction form
    128,941.80/177,936.78 = 71,577.73/x
  3. Step 3: Cross multiply
    128,941.80x = 177,936.78 × 71,577.73
  4. Step 4: Simplify right side
    128,941.80x = 12,736,310,795.91
  5. Step 5: Solve for x
    x = 12,736,310,795.91/128,941.80
  6. Step 6: Final answer
    x = 98,775.66

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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.