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Finding the Fourth Proportional to 156,120, 215,538.48 and 102,498.96

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Solution

The fourth proportional to 156,120, 215,538.48 and 102,498.96 is: 141,509.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,120 : 215,538.48 = 102,498.96 : x
  2. Step 2: Convert to fraction form
    156,120/215,538.48 = 102,498.96/x
  3. Step 3: Cross multiply
    156,120x = 215,538.48 × 102,498.96
  4. Step 4: Simplify right side
    156,120x = 22,092,470,039.98
  5. Step 5: Solve for x
    x = 22,092,470,039.98/156,120
  6. Step 6: Final answer
    x = 141,509.54

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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.