Home / 149,140.10-205,813.71-81,157.04

Finding the Fourth Proportional to 149,140.10, 205,813.71 and 81,157.04

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Solution

The fourth proportional to 149,140.10, 205,813.71 and 81,157.04 is: 111,996.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,140.10 : 205,813.71 = 81,157.04 : x
  2. Step 2: Convert to fraction form
    149,140.10/205,813.71 = 81,157.04/x
  3. Step 3: Cross multiply
    149,140.10x = 205,813.71 × 81,157.04
  4. Step 4: Simplify right side
    149,140.10x = 16,703,231,237.75
  5. Step 5: Solve for x
    x = 16,703,231,237.75/149,140.10
  6. Step 6: Final answer
    x = 111,996.91

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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.