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Finding the Fourth Proportional to 225,000.33, 310,561.70 and 128,255.12

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Solution

The fourth proportional to 225,000.33, 310,561.70 and 128,255.12 is: 177,026.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,000.33 : 310,561.70 = 128,255.12 : x
  2. Step 2: Convert to fraction form
    225,000.33/310,561.70 = 128,255.12/x
  3. Step 3: Cross multiply
    225,000.33x = 310,561.70 × 128,255.12
  4. Step 4: Simplify right side
    225,000.33x = 39,831,128,011.55
  5. Step 5: Solve for x
    x = 39,831,128,011.55/225,000.33
  6. Step 6: Final answer
    x = 177,026.97

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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.