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Finding the Fourth Proportional to 86,604.40, 129,906.60 and 58,537.90

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Solution

The fourth proportional to 86,604.40, 129,906.60 and 58,537.90 is: 87,806.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,604.40 : 129,906.60 = 58,537.90 : x
  2. Step 2: Convert to fraction form
    86,604.40/129,906.60 = 58,537.90/x
  3. Step 3: Cross multiply
    86,604.40x = 129,906.60 × 58,537.90
  4. Step 4: Simplify right side
    86,604.40x = 7,604,459,560.14
  5. Step 5: Solve for x
    x = 7,604,459,560.14/86,604.40
  6. Step 6: Final answer
    x = 87,806.85

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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.