Home / 149,405.10-206,173.02-81,420.62

Finding the Fourth Proportional to 149,405.10, 206,173.02 and 81,420.62

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Solution

The fourth proportional to 149,405.10, 206,173.02 and 81,420.62 is: 112,357.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,405.10 : 206,173.02 = 81,420.62 : x
  2. Step 2: Convert to fraction form
    149,405.10/206,173.02 = 81,420.62/x
  3. Step 3: Cross multiply
    149,405.10x = 206,173.02 × 81,420.62
  4. Step 4: Simplify right side
    149,405.10x = 16,786,735,115.67
  5. Step 5: Solve for x
    x = 16,786,735,115.67/149,405.10
  6. Step 6: Final answer
    x = 112,357.18

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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.