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Finding the Fourth Proportional to 86,609.38, 129,766.20 and 47,095.96

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Solution

The fourth proportional to 86,609.38, 129,766.20 and 47,095.96 is: 70,563.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,609.38 : 129,766.20 = 47,095.96 : x
  2. Step 2: Convert to fraction form
    86,609.38/129,766.20 = 47,095.96/x
  3. Step 3: Cross multiply
    86,609.38x = 129,766.20 × 47,095.96
  4. Step 4: Simplify right side
    86,609.38x = 6,111,463,764.55
  5. Step 5: Solve for x
    x = 6,111,463,764.55/86,609.38
  6. Step 6: Final answer
    x = 70,563.53

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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.