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Finding the Fourth Proportional to 229,258.75, 316,406.24 and 128,656.75

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Solution

The fourth proportional to 229,258.75, 316,406.24 and 128,656.75 is: 177,562.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,258.75 : 316,406.24 = 128,656.75 : x
  2. Step 2: Convert to fraction form
    229,258.75/316,406.24 = 128,656.75/x
  3. Step 3: Cross multiply
    229,258.75x = 316,406.24 × 128,656.75
  4. Step 4: Simplify right side
    229,258.75x = 40,707,797,874.84
  5. Step 5: Solve for x
    x = 40,707,797,874.84/229,258.75
  6. Step 6: Final answer
    x = 177,562.68

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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.