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Finding the Fourth Proportional to 156,276.54, 215,661.41 and 84,656.84

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Solution

The fourth proportional to 156,276.54, 215,661.41 and 84,656.84 is: 116,826.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,276.54 : 215,661.41 = 84,656.84 : x
  2. Step 2: Convert to fraction form
    156,276.54/215,661.41 = 84,656.84/x
  3. Step 3: Cross multiply
    156,276.54x = 215,661.41 × 84,656.84
  4. Step 4: Simplify right side
    156,276.54x = 18,257,211,978.95
  5. Step 5: Solve for x
    x = 18,257,211,978.95/156,276.54
  6. Step 6: Final answer
    x = 116,826.31

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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.