Home / 128,930.58-177,921.54-71,566.56

Finding the Fourth Proportional to 128,930.58, 177,921.54 and 71,566.56

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Solution

The fourth proportional to 128,930.58, 177,921.54 and 71,566.56 is: 98,760.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,930.58 : 177,921.54 = 71,566.56 : x
  2. Step 2: Convert to fraction form
    128,930.58/177,921.54 = 71,566.56/x
  3. Step 3: Cross multiply
    128,930.58x = 177,921.54 × 71,566.56
  4. Step 4: Simplify right side
    128,930.58x = 12,733,232,567.70
  5. Step 5: Solve for x
    x = 12,733,232,567.70/128,930.58
  6. Step 6: Final answer
    x = 98,760.38

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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.