Home / 149,189.77-205,881.68-81,206.54

Finding the Fourth Proportional to 149,189.77, 205,881.68 and 81,206.54

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Solution

The fourth proportional to 149,189.77, 205,881.68 and 81,206.54 is: 112,064.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,189.77 : 205,881.68 = 81,206.54 : x
  2. Step 2: Convert to fraction form
    149,189.77/205,881.68 = 81,206.54/x
  3. Step 3: Cross multiply
    149,189.77x = 205,881.68 × 81,206.54
  4. Step 4: Simplify right side
    149,189.77x = 16,718,938,623.98
  5. Step 5: Solve for x
    x = 16,718,938,623.98/149,189.77
  6. Step 6: Final answer
    x = 112,064.91

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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.