Home / 103,730.20-155,249.70-91,288.60

Finding the Fourth Proportional to 103,730.20, 155,249.70 and 91,288.60

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Solution

The fourth proportional to 103,730.20, 155,249.70 and 91,288.60 is: 136,628.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,730.20 : 155,249.70 = 91,288.60 : x
  2. Step 2: Convert to fraction form
    103,730.20/155,249.70 = 91,288.60/x
  3. Step 3: Cross multiply
    103,730.20x = 155,249.70 × 91,288.60
  4. Step 4: Simplify right side
    103,730.20x = 14,172,527,763.42
  5. Step 5: Solve for x
    x = 14,172,527,763.42/103,730.20
  6. Step 6: Final answer
    x = 136,628.75

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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.