Home / 149,223.86-205,922.54-81,239.38

Finding the Fourth Proportional to 149,223.86, 205,922.54 and 81,239.38

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Solution

The fourth proportional to 149,223.86, 205,922.54 and 81,239.38 is: 112,106.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,223.86 : 205,922.54 = 81,239.38 : x
  2. Step 2: Convert to fraction form
    149,223.86/205,922.54 = 81,239.38/x
  3. Step 3: Cross multiply
    149,223.86x = 205,922.54 × 81,239.38
  4. Step 4: Simplify right side
    149,223.86x = 16,729,019,477.63
  5. Step 5: Solve for x
    x = 16,729,019,477.63/149,223.86
  6. Step 6: Final answer
    x = 112,106.87

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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.