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Finding the Fourth Proportional to 156,239.87, 215,611.19 and 84,619.98

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Solution

The fourth proportional to 156,239.87, 215,611.19 and 84,619.98 is: 116,775.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,239.87 : 215,611.19 = 84,619.98 : x
  2. Step 2: Convert to fraction form
    156,239.87/215,611.19 = 84,619.98/x
  3. Step 3: Cross multiply
    156,239.87x = 215,611.19 × 84,619.98
  4. Step 4: Simplify right side
    156,239.87x = 18,245,014,162.48
  5. Step 5: Solve for x
    x = 18,245,014,162.48/156,239.87
  6. Step 6: Final answer
    x = 116,775.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.