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Finding the Fourth Proportional to 156,443.00, 215,889.25 and 84,821.48

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Solution

The fourth proportional to 156,443.00, 215,889.25 and 84,821.48 is: 117,052.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,443.00 : 215,889.25 = 84,821.48 : x
  2. Step 2: Convert to fraction form
    156,443.00/215,889.25 = 84,821.48/x
  3. Step 3: Cross multiply
    156,443.00x = 215,889.25 × 84,821.48
  4. Step 4: Simplify right side
    156,443.00x = 18,312,045,378.22
  5. Step 5: Solve for x
    x = 18,312,045,378.22/156,443.00
  6. Step 6: Final answer
    x = 117,052.51

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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.