Home / 128,945.20-177,940.20-72,357.52

Finding the Fourth Proportional to 128,945.20, 177,940.20 and 72,357.52

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Solution

The fourth proportional to 128,945.20, 177,940.20 and 72,357.52 is: 99,851.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,945.20 : 177,940.20 = 72,357.52 : x
  2. Step 2: Convert to fraction form
    128,945.20/177,940.20 = 72,357.52/x
  3. Step 3: Cross multiply
    128,945.20x = 177,940.20 × 72,357.52
  4. Step 4: Simplify right side
    128,945.20x = 12,875,311,580.30
  5. Step 5: Solve for x
    x = 12,875,311,580.30/128,945.20
  6. Step 6: Final answer
    x = 99,851.03

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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.