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Finding the Fourth Proportional to 86,292.54, 129,489.12 and 36,369.54

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Solution

The fourth proportional to 86,292.54, 129,489.12 and 36,369.54 is: 54,575.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,292.54 : 129,489.12 = 36,369.54 : x
  2. Step 2: Convert to fraction form
    86,292.54/129,489.12 = 36,369.54/x
  3. Step 3: Cross multiply
    86,292.54x = 129,489.12 × 36,369.54
  4. Step 4: Simplify right side
    86,292.54x = 4,709,459,729.40
  5. Step 5: Solve for x
    x = 4,709,459,729.40/86,292.54
  6. Step 6: Final answer
    x = 54,575.51

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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.