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Finding the Fourth Proportional to 339,457.73, 509,186.51 and 86,738.69

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Solution

The fourth proportional to 339,457.73, 509,186.51 and 86,738.69 is: 130,108.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,457.73 : 509,186.51 = 86,738.69 : x
  2. Step 2: Convert to fraction form
    339,457.73/509,186.51 = 86,738.69/x
  3. Step 3: Cross multiply
    339,457.73x = 509,186.51 × 86,738.69
  4. Step 4: Simplify right side
    339,457.73x = 44,166,167,863.45
  5. Step 5: Solve for x
    x = 44,166,167,863.45/339,457.73
  6. Step 6: Final answer
    x = 130,108.01

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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.