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Finding the Fourth Proportional to 339,749.55, 509,622.30 and 87,029.55

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Solution

The fourth proportional to 339,749.55, 509,622.30 and 87,029.55 is: 130,543.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,749.55 : 509,622.30 = 87,029.55 : x
  2. Step 2: Convert to fraction form
    339,749.55/509,622.30 = 87,029.55/x
  3. Step 3: Cross multiply
    339,749.55x = 509,622.30 × 87,029.55
  4. Step 4: Simplify right side
    339,749.55x = 44,352,199,438.97
  5. Step 5: Solve for x
    x = 44,352,199,438.97/339,749.55
  6. Step 6: Final answer
    x = 130,543.81

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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.