Home / 218,940.57-302,141.34-128,274.84

Finding the Fourth Proportional to 218,940.57, 302,141.34 and 128,274.84

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Solution

The fourth proportional to 218,940.57, 302,141.34 and 128,274.84 is: 177,021.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,940.57 : 302,141.34 = 128,274.84 : x
  2. Step 2: Convert to fraction form
    218,940.57/302,141.34 = 128,274.84/x
  3. Step 3: Cross multiply
    218,940.57x = 302,141.34 × 128,274.84
  4. Step 4: Simplify right side
    218,940.57x = 38,757,132,045.89
  5. Step 5: Solve for x
    x = 38,757,132,045.89/218,940.57
  6. Step 6: Final answer
    x = 177,021.24

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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.