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Finding the Fourth Proportional to 235,685.70, 325,249.29 and 128,258.64

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Solution

The fourth proportional to 235,685.70, 325,249.29 and 128,258.64 is: 176,998.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,685.70 : 325,249.29 = 128,258.64 : x
  2. Step 2: Convert to fraction form
    235,685.70/325,249.29 = 128,258.64/x
  3. Step 3: Cross multiply
    235,685.70x = 325,249.29 × 128,258.64
  4. Step 4: Simplify right side
    235,685.70x = 41,716,031,596.37
  5. Step 5: Solve for x
    x = 41,716,031,596.37/235,685.70
  6. Step 6: Final answer
    x = 176,998.57

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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.