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Finding the Fourth Proportional to 156,274.91, 215,659.17 and 84,655.21

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Solution

The fourth proportional to 156,274.91, 215,659.17 and 84,655.21 is: 116,824.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,274.91 : 215,659.17 = 84,655.21 : x
  2. Step 2: Convert to fraction form
    156,274.91/215,659.17 = 84,655.21/x
  3. Step 3: Cross multiply
    156,274.91x = 215,659.17 × 84,655.21
  4. Step 4: Simplify right side
    156,274.91x = 18,256,672,324.78
  5. Step 5: Solve for x
    x = 18,256,672,324.78/156,274.91
  6. Step 6: Final answer
    x = 116,824.08

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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.