Home / 87,811.68-121,172.42-51,995.64

Finding the Fourth Proportional to 87,811.68, 121,172.42 and 51,995.64

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Solution

The fourth proportional to 87,811.68, 121,172.42 and 51,995.64 is: 71,749.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,811.68 : 121,172.42 = 51,995.64 : x
  2. Step 2: Convert to fraction form
    87,811.68/121,172.42 = 51,995.64/x
  3. Step 3: Cross multiply
    87,811.68x = 121,172.42 × 51,995.64
  4. Step 4: Simplify right side
    87,811.68x = 6,300,437,528.25
  5. Step 5: Solve for x
    x = 6,300,437,528.25/87,811.68
  6. Step 6: Final answer
    x = 71,749.42

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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.