Home / 156,781.35-216,359.10-85,161.96

Finding the Fourth Proportional to 156,781.35, 216,359.10 and 85,161.96

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Solution

The fourth proportional to 156,781.35, 216,359.10 and 85,161.96 is: 117,523.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,781.35 : 216,359.10 = 85,161.96 : x
  2. Step 2: Convert to fraction form
    156,781.35/216,359.10 = 85,161.96/x
  3. Step 3: Cross multiply
    156,781.35x = 216,359.10 × 85,161.96
  4. Step 4: Simplify right side
    156,781.35x = 18,425,565,019.84
  5. Step 5: Solve for x
    x = 18,425,565,019.84/156,781.35
  6. Step 6: Final answer
    x = 117,523.96

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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.