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Finding the Fourth Proportional to 100,145.83, 150,226.91 and 43,978.13

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Solution

The fourth proportional to 100,145.83, 150,226.91 and 43,978.13 is: 65,970.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,145.83 : 150,226.91 = 43,978.13 : x
  2. Step 2: Convert to fraction form
    100,145.83/150,226.91 = 43,978.13/x
  3. Step 3: Cross multiply
    100,145.83x = 150,226.91 × 43,978.13
  4. Step 4: Simplify right side
    100,145.83x = 6,606,698,357.59
  5. Step 5: Solve for x
    x = 6,606,698,357.59/100,145.83
  6. Step 6: Final answer
    x = 65,970.78

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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.