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Finding the Fourth Proportional to 515,765.88, 773,612.31 and 136,678.23

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Solution

The fourth proportional to 515,765.88, 773,612.31 and 136,678.23 is: 205,007.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,765.88 : 773,612.31 = 136,678.23 : x
  2. Step 2: Convert to fraction form
    515,765.88/773,612.31 = 136,678.23/x
  3. Step 3: Cross multiply
    515,765.88x = 773,612.31 × 136,678.23
  4. Step 4: Simplify right side
    515,765.88x = 105,735,961,237.01
  5. Step 5: Solve for x
    x = 105,735,961,237.01/515,765.88
  6. Step 6: Final answer
    x = 205,007.67

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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.