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Finding the Fourth Proportional to 128,937.40, 193,406.10 and 126,969.10

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Solution

The fourth proportional to 128,937.40, 193,406.10 and 126,969.10 is: 190,453.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,937.40 : 193,406.10 = 126,969.10 : x
  2. Step 2: Convert to fraction form
    128,937.40/193,406.10 = 126,969.10/x
  3. Step 3: Cross multiply
    128,937.40x = 193,406.10 × 126,969.10
  4. Step 4: Simplify right side
    128,937.40x = 24,556,598,451.51
  5. Step 5: Solve for x
    x = 24,556,598,451.51/128,937.40
  6. Step 6: Final answer
    x = 190,453.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.