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Finding the Fourth Proportional to 225,143.94, 310,668.21 and 128,360.28

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Solution

The fourth proportional to 225,143.94, 310,668.21 and 128,360.28 is: 177,119.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,143.94 : 310,668.21 = 128,360.28 : x
  2. Step 2: Convert to fraction form
    225,143.94/310,668.21 = 128,360.28/x
  3. Step 3: Cross multiply
    225,143.94x = 310,668.21 × 128,360.28
  4. Step 4: Simplify right side
    225,143.94x = 39,877,458,422.70
  5. Step 5: Solve for x
    x = 39,877,458,422.70/225,143.94
  6. Step 6: Final answer
    x = 177,119.84

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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.