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Finding the Fourth Proportional to 143,618.60, 215,427.90 and 54,826.40

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Solution

The fourth proportional to 143,618.60, 215,427.90 and 54,826.40 is: 82,239.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,618.60 : 215,427.90 = 54,826.40 : x
  2. Step 2: Convert to fraction form
    143,618.60/215,427.90 = 54,826.40/x
  3. Step 3: Cross multiply
    143,618.60x = 215,427.90 × 54,826.40
  4. Step 4: Simplify right side
    143,618.60x = 11,811,136,216.56
  5. Step 5: Solve for x
    x = 11,811,136,216.56/143,618.60
  6. Step 6: Final answer
    x = 82,239.60

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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.