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Finding the Fourth Proportional to 100,285.59, 150,428.63 and 25,405.75

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Solution

The fourth proportional to 100,285.59, 150,428.63 and 25,405.75 is: 38,108.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,285.59 : 150,428.63 = 25,405.75 : x
  2. Step 2: Convert to fraction form
    100,285.59/150,428.63 = 25,405.75/x
  3. Step 3: Cross multiply
    100,285.59x = 150,428.63 × 25,405.75
  4. Step 4: Simplify right side
    100,285.59x = 3,821,752,166.62
  5. Step 5: Solve for x
    x = 3,821,752,166.62/100,285.59
  6. Step 6: Final answer
    x = 38,108.69

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1.5x scale

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.