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Finding the Fourth Proportional to 156,101.77, 215,420.40 and 84,481.78

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Solution

The fourth proportional to 156,101.77, 215,420.40 and 84,481.78 is: 116,584.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,101.77 : 215,420.40 = 84,481.78 : x
  2. Step 2: Convert to fraction form
    156,101.77/215,420.40 = 84,481.78/x
  3. Step 3: Cross multiply
    156,101.77x = 215,420.40 × 84,481.78
  4. Step 4: Simplify right side
    156,101.77x = 18,199,098,840.31
  5. Step 5: Solve for x
    x = 18,199,098,840.31/156,101.77
  6. Step 6: Final answer
    x = 116,584.83

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1.5x scale

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.