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Finding the Fourth Proportional to 79,221.99, 109,336.73 and 51,009.69

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Solution

The fourth proportional to 79,221.99, 109,336.73 and 51,009.69 is: 70,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,221.99 : 109,336.73 = 51,009.69 : x
  2. Step 2: Convert to fraction form
    79,221.99/109,336.73 = 51,009.69/x
  3. Step 3: Cross multiply
    79,221.99x = 109,336.73 × 51,009.69
  4. Step 4: Simplify right side
    79,221.99x = 5,577,232,447.87
  5. Step 5: Solve for x
    x = 5,577,232,447.87/79,221.99
  6. Step 6: Final answer
    x = 70,400.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.