Home / 128,927.28-177,921.20-71,567.73

Finding the Fourth Proportional to 128,927.28, 177,921.20 and 71,567.73

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Solution

The fourth proportional to 128,927.28, 177,921.20 and 71,567.73 is: 98,764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.28 : 177,921.20 = 71,567.73 : x
  2. Step 2: Convert to fraction form
    128,927.28/177,921.20 = 71,567.73/x
  3. Step 3: Cross multiply
    128,927.28x = 177,921.20 × 71,567.73
  4. Step 4: Simplify right side
    128,927.28x = 12,733,416,045.04
  5. Step 5: Solve for x
    x = 12,733,416,045.04/128,927.28
  6. Step 6: Final answer
    x = 98,764.33

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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.