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Finding the Fourth Proportional to 339,749.07, 509,611.94 and 87,031.77

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Solution

The fourth proportional to 339,749.07, 509,611.94 and 87,031.77 is: 130,544.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,749.07 : 509,611.94 = 87,031.77 : x
  2. Step 2: Convert to fraction form
    339,749.07/509,611.94 = 87,031.77/x
  3. Step 3: Cross multiply
    339,749.07x = 509,611.94 × 87,031.77
  4. Step 4: Simplify right side
    339,749.07x = 44,352,427,131.50
  5. Step 5: Solve for x
    x = 44,352,427,131.50/339,749.07
  6. Step 6: Final answer
    x = 130,544.66

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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.