Home / 128,948.58-177,946.38-71,584.56

Finding the Fourth Proportional to 128,948.58, 177,946.38 and 71,584.56

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Solution

The fourth proportional to 128,948.58, 177,946.38 and 71,584.56 is: 98,785.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,948.58 : 177,946.38 = 71,584.56 : x
  2. Step 2: Convert to fraction form
    128,948.58/177,946.38 = 71,584.56/x
  3. Step 3: Cross multiply
    128,948.58x = 177,946.38 × 71,584.56
  4. Step 4: Simplify right side
    128,948.58x = 12,738,213,315.89
  5. Step 5: Solve for x
    x = 12,738,213,315.89/128,948.58
  6. Step 6: Final answer
    x = 98,785.22

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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.