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Finding the Fourth Proportional to 86,321.68, 129,478.20 and 23,992.72

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Solution

The fourth proportional to 86,321.68, 129,478.20 and 23,992.72 is: 35,987.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,321.68 : 129,478.20 = 23,992.72 : x
  2. Step 2: Convert to fraction form
    86,321.68/129,478.20 = 23,992.72/x
  3. Step 3: Cross multiply
    86,321.68x = 129,478.20 × 23,992.72
  4. Step 4: Simplify right side
    86,321.68x = 3,106,534,198.70
  5. Step 5: Solve for x
    x = 3,106,534,198.70/86,321.68
  6. Step 6: Final answer
    x = 35,987.88

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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.