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Finding the Fourth Proportional to 86,344.41, 129,530.48 and 36,431.87

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Solution

The fourth proportional to 86,344.41, 129,530.48 and 36,431.87 is: 54,653.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,344.41 : 129,530.48 = 36,431.87 : x
  2. Step 2: Convert to fraction form
    86,344.41/129,530.48 = 36,431.87/x
  3. Step 3: Cross multiply
    86,344.41x = 129,530.48 × 36,431.87
  4. Step 4: Simplify right side
    86,344.41x = 4,719,036,778.59
  5. Step 5: Solve for x
    x = 4,719,036,778.59/86,344.41
  6. Step 6: Final answer
    x = 54,653.64

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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.