Home / 131,213.18-181,161.36-100,945.10

Finding the Fourth Proportional to 131,213.18, 181,161.36 and 100,945.10

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Solution

The fourth proportional to 131,213.18, 181,161.36 and 100,945.10 is: 139,371.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,213.18 : 181,161.36 = 100,945.10 : x
  2. Step 2: Convert to fraction form
    131,213.18/181,161.36 = 100,945.10/x
  3. Step 3: Cross multiply
    131,213.18x = 181,161.36 × 100,945.10
  4. Step 4: Simplify right side
    131,213.18x = 18,287,352,054.24
  5. Step 5: Solve for x
    x = 18,287,352,054.24/131,213.18
  6. Step 6: Final answer
    x = 139,371.30

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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.