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Finding the Fourth Proportional to 86,654.82, 129,989.52 and 30,489.01

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Solution

The fourth proportional to 86,654.82, 129,989.52 and 30,489.01 is: 45,736.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,654.82 : 129,989.52 = 30,489.01 : x
  2. Step 2: Convert to fraction form
    86,654.82/129,989.52 = 30,489.01/x
  3. Step 3: Cross multiply
    86,654.82x = 129,989.52 × 30,489.01
  4. Step 4: Simplify right side
    86,654.82x = 3,963,251,775.18
  5. Step 5: Solve for x
    x = 3,963,251,775.18/86,654.82
  6. Step 6: Final answer
    x = 45,736.08

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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.