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Finding the Fourth Proportional to 100,405.25, 150,608.95 and 30,285.17

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Solution

The fourth proportional to 100,405.25, 150,608.95 and 30,285.17 is: 45,428.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,405.25 : 150,608.95 = 30,285.17 : x
  2. Step 2: Convert to fraction form
    100,405.25/150,608.95 = 30,285.17/x
  3. Step 3: Cross multiply
    100,405.25x = 150,608.95 × 30,285.17
  4. Step 4: Simplify right side
    100,405.25x = 4,561,216,825.51
  5. Step 5: Solve for x
    x = 4,561,216,825.51/100,405.25
  6. Step 6: Final answer
    x = 45,428.07

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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.