Home / 103,638.20-155,439.91-28,765.95

Finding the Fourth Proportional to 103,638.20, 155,439.91 and 28,765.95

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Solution

The fourth proportional to 103,638.20, 155,439.91 and 28,765.95 is: 43,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.20 : 155,439.91 = 28,765.95 : x
  2. Step 2: Convert to fraction form
    103,638.20/155,439.91 = 28,765.95/x
  3. Step 3: Cross multiply
    103,638.20x = 155,439.91 × 28,765.95
  4. Step 4: Simplify right side
    103,638.20x = 4,471,376,535.23
  5. Step 5: Solve for x
    x = 4,471,376,535.23/103,638.20
  6. Step 6: Final answer
    x = 43,144.10

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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.