Home / 103,445.20-155,167.80-102,789.10

Finding the Fourth Proportional to 103,445.20, 155,167.80 and 102,789.10

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Solution

The fourth proportional to 103,445.20, 155,167.80 and 102,789.10 is: 154,183.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,445.20 : 155,167.80 = 102,789.10 : x
  2. Step 2: Convert to fraction form
    103,445.20/155,167.80 = 102,789.10/x
  3. Step 3: Cross multiply
    103,445.20x = 155,167.80 × 102,789.10
  4. Step 4: Simplify right side
    103,445.20x = 15,949,558,510.98
  5. Step 5: Solve for x
    x = 15,949,558,510.98/103,445.20
  6. Step 6: Final answer
    x = 154,183.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.