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Finding the Fourth Proportional to 228,321.09, 315,209.79 and 137,700.11

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Solution

The fourth proportional to 228,321.09, 315,209.79 and 137,700.11 is: 190,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,321.09 : 315,209.79 = 137,700.11 : x
  2. Step 2: Convert to fraction form
    228,321.09/315,209.79 = 137,700.11/x
  3. Step 3: Cross multiply
    228,321.09x = 315,209.79 × 137,700.11
  4. Step 4: Simplify right side
    228,321.09x = 43,404,421,180.03
  5. Step 5: Solve for x
    x = 43,404,421,180.03/228,321.09
  6. Step 6: Final answer
    x = 190,102.55

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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.