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Finding the Fourth Proportional to 86,992.80, 130,489.28 and 23,813.45

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Solution

The fourth proportional to 86,992.80, 130,489.28 and 23,813.45 is: 35,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,992.80 : 130,489.28 = 23,813.45 : x
  2. Step 2: Convert to fraction form
    86,992.80/130,489.28 = 23,813.45/x
  3. Step 3: Cross multiply
    86,992.80x = 130,489.28 × 23,813.45
  4. Step 4: Simplify right side
    86,992.80x = 3,107,399,825.75
  5. Step 5: Solve for x
    x = 3,107,399,825.75/86,992.80
  6. Step 6: Final answer
    x = 35,720.20

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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.