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Finding the Fourth Proportional to 143,633.58, 215,410.26 and 85,893.12

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Solution

The fourth proportional to 143,633.58, 215,410.26 and 85,893.12 is: 128,815.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,633.58 : 215,410.26 = 85,893.12 : x
  2. Step 2: Convert to fraction form
    143,633.58/215,410.26 = 85,893.12/x
  3. Step 3: Cross multiply
    143,633.58x = 215,410.26 × 85,893.12
  4. Step 4: Simplify right side
    143,633.58x = 18,502,259,311.41
  5. Step 5: Solve for x
    x = 18,502,259,311.41/143,633.58
  6. Step 6: Final answer
    x = 128,815.69

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1.5x scale

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.