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Finding the Fourth Proportional to 245,941.44, 339,395.85 and 138,512.76

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Solution

The fourth proportional to 245,941.44, 339,395.85 and 138,512.76 is: 191,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,941.44 : 339,395.85 = 138,512.76 : x
  2. Step 2: Convert to fraction form
    245,941.44/339,395.85 = 138,512.76/x
  3. Step 3: Cross multiply
    245,941.44x = 339,395.85 × 138,512.76
  4. Step 4: Simplify right side
    245,941.44x = 47,010,655,916.05
  5. Step 5: Solve for x
    x = 47,010,655,916.05/245,941.44
  6. Step 6: Final answer
    x = 191,145.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.