Home / 143,908.10-215,570.55-81,505.70

Finding the Fourth Proportional to 143,908.10, 215,570.55 and 81,505.70

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Solution

The fourth proportional to 143,908.10, 215,570.55 and 81,505.70 is: 122,093.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,908.10 : 215,570.55 = 81,505.70 : x
  2. Step 2: Convert to fraction form
    143,908.10/215,570.55 = 81,505.70/x
  3. Step 3: Cross multiply
    143,908.10x = 215,570.55 × 81,505.70
  4. Step 4: Simplify right side
    143,908.10x = 17,570,228,577.14
  5. Step 5: Solve for x
    x = 17,570,228,577.14/143,908.10
  6. Step 6: Final answer
    x = 122,093.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.