Home / 149,142.06-205,813.41-81,156.74

Finding the Fourth Proportional to 149,142.06, 205,813.41 and 81,156.74

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Solution

The fourth proportional to 149,142.06, 205,813.41 and 81,156.74 is: 111,994.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,142.06 : 205,813.41 = 81,156.74 : x
  2. Step 2: Convert to fraction form
    149,142.06/205,813.41 = 81,156.74/x
  3. Step 3: Cross multiply
    149,142.06x = 205,813.41 × 81,156.74
  4. Step 4: Simplify right side
    149,142.06x = 16,703,144,070.48
  5. Step 5: Solve for x
    x = 16,703,144,070.48/149,142.06
  6. Step 6: Final answer
    x = 111,994.86

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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.