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Finding the Fourth Proportional to 156,680.72, 216,221.64 and 85,060.88

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Solution

The fourth proportional to 156,680.72, 216,221.64 and 85,060.88 is: 117,385.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,680.72 : 216,221.64 = 85,060.88 : x
  2. Step 2: Convert to fraction form
    156,680.72/216,221.64 = 85,060.88/x
  3. Step 3: Cross multiply
    156,680.72x = 216,221.64 × 85,060.88
  4. Step 4: Simplify right side
    156,680.72x = 18,392,002,973.44
  5. Step 5: Solve for x
    x = 18,392,002,973.44/156,680.72
  6. Step 6: Final answer
    x = 117,385.23

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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.