Home / 156,743.80-216,355.62-100,155.40

Finding the Fourth Proportional to 156,743.80, 216,355.62 and 100,155.40

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Solution

The fourth proportional to 156,743.80, 216,355.62 and 100,155.40 is: 138,245.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,743.80 : 216,355.62 = 100,155.40 : x
  2. Step 2: Convert to fraction form
    156,743.80/216,355.62 = 100,155.40/x
  3. Step 3: Cross multiply
    156,743.80x = 216,355.62 × 100,155.40
  4. Step 4: Simplify right side
    156,743.80x = 21,669,183,663.35
  5. Step 5: Solve for x
    x = 21,669,183,663.35/156,743.80
  6. Step 6: Final answer
    x = 138,245.87

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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.