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Finding the Fourth Proportional to 225,147.58, 310,660.81 and 128,347.20

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Solution

The fourth proportional to 225,147.58, 310,660.81 and 128,347.20 is: 177,094.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,147.58 : 310,660.81 = 128,347.20 : x
  2. Step 2: Convert to fraction form
    225,147.58/310,660.81 = 128,347.20/x
  3. Step 3: Cross multiply
    225,147.58x = 310,660.81 × 128,347.20
  4. Step 4: Simplify right side
    225,147.58x = 39,872,444,792.36
  5. Step 5: Solve for x
    x = 39,872,444,792.36/225,147.58
  6. Step 6: Final answer
    x = 177,094.71

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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.