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Finding the Fourth Proportional to 156,956.85, 216,609.30 and 85,335.35

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Solution

The fourth proportional to 156,956.85, 216,609.30 and 85,335.35 is: 117,767.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,956.85 : 216,609.30 = 85,335.35 : x
  2. Step 2: Convert to fraction form
    156,956.85/216,609.30 = 85,335.35/x
  3. Step 3: Cross multiply
    156,956.85x = 216,609.30 × 85,335.35
  4. Step 4: Simplify right side
    156,956.85x = 18,484,429,345.71
  5. Step 5: Solve for x
    x = 18,484,429,345.71/156,956.85
  6. Step 6: Final answer
    x = 117,767.59

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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.