Home / 149,110.12-205,775.76-81,130.78

Finding the Fourth Proportional to 149,110.12, 205,775.76 and 81,130.78

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Solution

The fourth proportional to 149,110.12, 205,775.76 and 81,130.78 is: 111,962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,110.12 : 205,775.76 = 81,130.78 : x
  2. Step 2: Convert to fraction form
    149,110.12/205,775.76 = 81,130.78/x
  3. Step 3: Cross multiply
    149,110.12x = 205,775.76 × 81,130.78
  4. Step 4: Simplify right side
    149,110.12x = 16,694,747,913.89
  5. Step 5: Solve for x
    x = 16,694,747,913.89/149,110.12
  6. Step 6: Final answer
    x = 111,962.54

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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.