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Finding the Fourth Proportional to 156,645, 216,183.06 and 89,589.96

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Solution

The fourth proportional to 156,645, 216,183.06 and 89,589.96 is: 123,641.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,645 : 216,183.06 = 89,589.96 : x
  2. Step 2: Convert to fraction form
    156,645/216,183.06 = 89,589.96/x
  3. Step 3: Cross multiply
    156,645x = 216,183.06 × 89,589.96
  4. Step 4: Simplify right side
    156,645x = 19,367,831,698.08
  5. Step 5: Solve for x
    x = 19,367,831,698.08/156,645
  6. Step 6: Final answer
    x = 123,641.56

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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.