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Finding the Fourth Proportional to 143,619.40, 215,342.70 and 73,635.40

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Solution

The fourth proportional to 143,619.40, 215,342.70 and 73,635.40 is: 110,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,619.40 : 215,342.70 = 73,635.40 : x
  2. Step 2: Convert to fraction form
    143,619.40/215,342.70 = 73,635.40/x
  3. Step 3: Cross multiply
    143,619.40x = 215,342.70 × 73,635.40
  4. Step 4: Simplify right side
    143,619.40x = 15,856,845,851.58
  5. Step 5: Solve for x
    x = 15,856,845,851.58/143,619.40
  6. Step 6: Final answer
    x = 110,408.80

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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.