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Finding the Fourth Proportional to 86,291.12, 129,453 and 33,697.28

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Solution

The fourth proportional to 86,291.12, 129,453 and 33,697.28 is: 50,552.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,291.12 : 129,453 = 33,697.28 : x
  2. Step 2: Convert to fraction form
    86,291.12/129,453 = 33,697.28/x
  3. Step 3: Cross multiply
    86,291.12x = 129,453 × 33,697.28
  4. Step 4: Simplify right side
    86,291.12x = 4,362,213,987.84
  5. Step 5: Solve for x
    x = 4,362,213,987.84/86,291.12
  6. Step 6: Final answer
    x = 50,552.29

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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.