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Finding the Fourth Proportional to 235,679.85, 325,245.03 and 128,256.81

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Solution

The fourth proportional to 235,679.85, 325,245.03 and 128,256.81 is: 176,998.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,679.85 : 325,245.03 = 128,256.81 : x
  2. Step 2: Convert to fraction form
    235,679.85/325,245.03 = 128,256.81/x
  3. Step 3: Cross multiply
    235,679.85x = 325,245.03 × 128,256.81
  4. Step 4: Simplify right side
    235,679.85x = 41,714,890,016.15
  5. Step 5: Solve for x
    x = 41,714,890,016.15/235,679.85
  6. Step 6: Final answer
    x = 176,998.12

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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.