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Finding the Fourth Proportional to 235,917.54, 325,570.08 and 128,489.67

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Solution

The fourth proportional to 235,917.54, 325,570.08 and 128,489.67 is: 177,317.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,917.54 : 325,570.08 = 128,489.67 : x
  2. Step 2: Convert to fraction form
    235,917.54/325,570.08 = 128,489.67/x
  3. Step 3: Cross multiply
    235,917.54x = 325,570.08 × 128,489.67
  4. Step 4: Simplify right side
    235,917.54x = 41,832,392,141.07
  5. Step 5: Solve for x
    x = 41,832,392,141.07/235,917.54
  6. Step 6: Final answer
    x = 177,317.85

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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.