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Finding the Fourth Proportional to 80,988.59, 121,485.73 and 21,825.68

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Solution

The fourth proportional to 80,988.59, 121,485.73 and 21,825.68 is: 32,739.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,988.59 : 121,485.73 = 21,825.68 : x
  2. Step 2: Convert to fraction form
    80,988.59/121,485.73 = 21,825.68/x
  3. Step 3: Cross multiply
    80,988.59x = 121,485.73 × 21,825.68
  4. Step 4: Simplify right side
    80,988.59x = 2,651,508,667.55
  5. Step 5: Solve for x
    x = 2,651,508,667.55/80,988.59
  6. Step 6: Final answer
    x = 32,739.29

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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.