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Finding the Fourth Proportional to 86,420.93, 129,620.46 and 33,867.32

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Solution

The fourth proportional to 86,420.93, 129,620.46 and 33,867.32 is: 50,796.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,420.93 : 129,620.46 = 33,867.32 : x
  2. Step 2: Convert to fraction form
    86,420.93/129,620.46 = 33,867.32/x
  3. Step 3: Cross multiply
    86,420.93x = 129,620.46 × 33,867.32
  4. Step 4: Simplify right side
    86,420.93x = 4,389,897,597.37
  5. Step 5: Solve for x
    x = 4,389,897,597.37/86,420.93
  6. Step 6: Final answer
    x = 50,796.69

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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.