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Finding the Fourth Proportional to 153,208.86, 211,341.90 and 91,939.20

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Solution

The fourth proportional to 153,208.86, 211,341.90 and 91,939.20 is: 126,824.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,208.86 : 211,341.90 = 91,939.20 : x
  2. Step 2: Convert to fraction form
    153,208.86/211,341.90 = 91,939.20/x
  3. Step 3: Cross multiply
    153,208.86x = 211,341.90 × 91,939.20
  4. Step 4: Simplify right side
    153,208.86x = 19,430,605,212.48
  5. Step 5: Solve for x
    x = 19,430,605,212.48/153,208.86
  6. Step 6: Final answer
    x = 126,824.29

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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.