Home / 128,819-177,709.74-91,114.04

Finding the Fourth Proportional to 128,819, 177,709.74 and 91,114.04

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Solution

The fourth proportional to 128,819, 177,709.74 and 91,114.04 is: 125,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819 : 177,709.74 = 91,114.04 : x
  2. Step 2: Convert to fraction form
    128,819/177,709.74 = 91,114.04/x
  3. Step 3: Cross multiply
    128,819x = 177,709.74 × 91,114.04
  4. Step 4: Simplify right side
    128,819x = 16,191,852,358.75
  5. Step 5: Solve for x
    x = 16,191,852,358.75/128,819
  6. Step 6: Final answer
    x = 125,694.60

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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.