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Finding the Fourth Proportional to 156,393.72, 215,823.48 and 84,773.68

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Solution

The fourth proportional to 156,393.72, 215,823.48 and 84,773.68 is: 116,987.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,393.72 : 215,823.48 = 84,773.68 : x
  2. Step 2: Convert to fraction form
    156,393.72/215,823.48 = 84,773.68/x
  3. Step 3: Cross multiply
    156,393.72x = 215,823.48 × 84,773.68
  4. Step 4: Simplify right side
    156,393.72x = 18,296,150,630.01
  5. Step 5: Solve for x
    x = 18,296,150,630.01/156,393.72
  6. Step 6: Final answer
    x = 116,987.76

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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.