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Finding the Fourth Proportional to 228,949.75, 315,950.66 and 128,347.75

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Solution

The fourth proportional to 228,949.75, 315,950.66 and 128,347.75 is: 177,119.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,949.75 : 315,950.66 = 128,347.75 : x
  2. Step 2: Convert to fraction form
    228,949.75/315,950.66 = 128,347.75/x
  3. Step 3: Cross multiply
    228,949.75x = 315,950.66 × 128,347.75
  4. Step 4: Simplify right side
    228,949.75x = 40,551,556,322.02
  5. Step 5: Solve for x
    x = 40,551,556,322.02/228,949.75
  6. Step 6: Final answer
    x = 177,119.90

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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.