Home / 149,405.17-206,173.89-81,420.76

Finding the Fourth Proportional to 149,405.17, 206,173.89 and 81,420.76

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Solution

The fourth proportional to 149,405.17, 206,173.89 and 81,420.76 is: 112,357.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,405.17 : 206,173.89 = 81,420.76 : x
  2. Step 2: Convert to fraction form
    149,405.17/206,173.89 = 81,420.76/x
  3. Step 3: Cross multiply
    149,405.17x = 206,173.89 × 81,420.76
  4. Step 4: Simplify right side
    149,405.17x = 16,786,834,815.96
  5. Step 5: Solve for x
    x = 16,786,834,815.96/149,405.17
  6. Step 6: Final answer
    x = 112,357.79

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1.5x scale

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.