Home / 131,709.10-181,738.99-79,999.28

Finding the Fourth Proportional to 131,709.10, 181,738.99 and 79,999.28

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Solution

The fourth proportional to 131,709.10, 181,738.99 and 79,999.28 is: 110,387.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,709.10 : 181,738.99 = 79,999.28 : x
  2. Step 2: Convert to fraction form
    131,709.10/181,738.99 = 79,999.28/x
  3. Step 3: Cross multiply
    131,709.10x = 181,738.99 × 79,999.28
  4. Step 4: Simplify right side
    131,709.10x = 14,538,988,347.93
  5. Step 5: Solve for x
    x = 14,538,988,347.93/131,709.10
  6. Step 6: Final answer
    x = 110,387.12

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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.