Home / 103,439.20-155,158.80-102,783.10

Finding the Fourth Proportional to 103,439.20, 155,158.80 and 102,783.10

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Solution

The fourth proportional to 103,439.20, 155,158.80 and 102,783.10 is: 154,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,439.20 : 155,158.80 = 102,783.10 : x
  2. Step 2: Convert to fraction form
    103,439.20/155,158.80 = 102,783.10/x
  3. Step 3: Cross multiply
    103,439.20x = 155,158.80 × 102,783.10
  4. Step 4: Simplify right side
    103,439.20x = 15,947,702,456.28
  5. Step 5: Solve for x
    x = 15,947,702,456.28/103,439.20
  6. Step 6: Final answer
    x = 154,174.65

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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.