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Finding the Fourth Proportional to 156,956.62, 216,609 and 85,335.11

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Solution

The fourth proportional to 156,956.62, 216,609 and 85,335.11 is: 117,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,956.62 : 216,609 = 85,335.11 : x
  2. Step 2: Convert to fraction form
    156,956.62/216,609 = 85,335.11/x
  3. Step 3: Cross multiply
    156,956.62x = 216,609 × 85,335.11
  4. Step 4: Simplify right side
    156,956.62x = 18,484,352,841.99
  5. Step 5: Solve for x
    x = 18,484,352,841.99/156,956.62
  6. Step 6: Final answer
    x = 117,767.27

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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.