Home / 156,966.86-216,618.64-85,351.80

Finding the Fourth Proportional to 156,966.86, 216,618.64 and 85,351.80

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Solution

The fourth proportional to 156,966.86, 216,618.64 and 85,351.80 is: 117,787.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,966.86 : 216,618.64 = 85,351.80 : x
  2. Step 2: Convert to fraction form
    156,966.86/216,618.64 = 85,351.80/x
  3. Step 3: Cross multiply
    156,966.86x = 216,618.64 × 85,351.80
  4. Step 4: Simplify right side
    156,966.86x = 18,488,790,837.55
  5. Step 5: Solve for x
    x = 18,488,790,837.55/156,966.86
  6. Step 6: Final answer
    x = 117,787.86

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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.