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Finding the Fourth Proportional to 249,881.72, 374,822.28 and 81,401.78

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Solution

The fourth proportional to 249,881.72, 374,822.28 and 81,401.78 is: 122,102.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,881.72 : 374,822.28 = 81,401.78 : x
  2. Step 2: Convert to fraction form
    249,881.72/374,822.28 = 81,401.78/x
  3. Step 3: Cross multiply
    249,881.72x = 374,822.28 × 81,401.78
  4. Step 4: Simplify right side
    249,881.72x = 30,511,198,901.55
  5. Step 5: Solve for x
    x = 30,511,198,901.55/249,881.72
  6. Step 6: Final answer
    x = 122,102.57

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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.