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Finding the Fourth Proportional to 86,137.01, 129,073.94 and 36,189.79

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Solution

The fourth proportional to 86,137.01, 129,073.94 and 36,189.79 is: 54,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,137.01 : 129,073.94 = 36,189.79 : x
  2. Step 2: Convert to fraction form
    86,137.01/129,073.94 = 36,189.79/x
  3. Step 3: Cross multiply
    86,137.01x = 129,073.94 × 36,189.79
  4. Step 4: Simplify right side
    86,137.01x = 4,671,158,783.07
  5. Step 5: Solve for x
    x = 4,671,158,783.07/86,137.01
  6. Step 6: Final answer
    x = 54,229.40

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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.