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Finding the Fourth Proportional to 339,393.92, 509,090.66 and 86,674.46

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Solution

The fourth proportional to 339,393.92, 509,090.66 and 86,674.46 is: 130,011.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,393.92 : 509,090.66 = 86,674.46 : x
  2. Step 2: Convert to fraction form
    339,393.92/509,090.66 = 86,674.46/x
  3. Step 3: Cross multiply
    339,393.92x = 509,090.66 × 86,674.46
  4. Step 4: Simplify right side
    339,393.92x = 44,125,157,613.17
  5. Step 5: Solve for x
    x = 44,125,157,613.17/339,393.92
  6. Step 6: Final answer
    x = 130,011.63

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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.