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Finding the Fourth Proportional to 156,279.16, 215,665.04 and 84,659.48

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Solution

The fourth proportional to 156,279.16, 215,665.04 and 84,659.48 is: 116,829.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,279.16 : 215,665.04 = 84,659.48 : x
  2. Step 2: Convert to fraction form
    156,279.16/215,665.04 = 84,659.48/x
  3. Step 3: Cross multiply
    156,279.16x = 215,665.04 × 84,659.48
  4. Step 4: Simplify right side
    156,279.16x = 18,258,089,273.90
  5. Step 5: Solve for x
    x = 18,258,089,273.90/156,279.16
  6. Step 6: Final answer
    x = 116,829.97

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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.