Home / 149,125.05-205,786.35-81,142.29

Finding the Fourth Proportional to 149,125.05, 205,786.35 and 81,142.29

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Solution

The fourth proportional to 149,125.05, 205,786.35 and 81,142.29 is: 111,972.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,125.05 : 205,786.35 = 81,142.29 : x
  2. Step 2: Convert to fraction form
    149,125.05/205,786.35 = 81,142.29/x
  3. Step 3: Cross multiply
    149,125.05x = 205,786.35 × 81,142.29
  4. Step 4: Simplify right side
    149,125.05x = 16,697,975,689.74
  5. Step 5: Solve for x
    x = 16,697,975,689.74/149,125.05
  6. Step 6: Final answer
    x = 111,972.98

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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.