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Finding the Fourth Proportional to 249,405.78, 374,161.18 and 80,912.94

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Solution

The fourth proportional to 249,405.78, 374,161.18 and 80,912.94 is: 121,386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,405.78 : 374,161.18 = 80,912.94 : x
  2. Step 2: Convert to fraction form
    249,405.78/374,161.18 = 80,912.94/x
  3. Step 3: Cross multiply
    249,405.78x = 374,161.18 × 80,912.94
  4. Step 4: Simplify right side
    249,405.78x = 30,274,481,107.67
  5. Step 5: Solve for x
    x = 30,274,481,107.67/249,405.78
  6. Step 6: Final answer
    x = 121,386.45

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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.