Home / 143,977.20-215,712.12-128,321.52

Finding the Fourth Proportional to 143,977.20, 215,712.12 and 128,321.52

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Solution

The fourth proportional to 143,977.20, 215,712.12 and 128,321.52 is: 192,256.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,977.20 : 215,712.12 = 128,321.52 : x
  2. Step 2: Convert to fraction form
    143,977.20/215,712.12 = 128,321.52/x
  3. Step 3: Cross multiply
    143,977.20x = 215,712.12 × 128,321.52
  4. Step 4: Simplify right side
    143,977.20x = 27,680,507,120.82
  5. Step 5: Solve for x
    x = 27,680,507,120.82/143,977.20
  6. Step 6: Final answer
    x = 192,256.18

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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.