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Finding the Fourth Proportional to 245,996.31, 339,429.81 and 138,543.33

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Solution

The fourth proportional to 245,996.31, 339,429.81 and 138,543.33 is: 191,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,996.31 : 339,429.81 = 138,543.33 : x
  2. Step 2: Convert to fraction form
    245,996.31/339,429.81 = 138,543.33/x
  3. Step 3: Cross multiply
    245,996.31x = 339,429.81 × 138,543.33
  4. Step 4: Simplify right side
    245,996.31x = 47,025,736,178.67
  5. Step 5: Solve for x
    x = 47,025,736,178.67/245,996.31
  6. Step 6: Final answer
    x = 191,164.40

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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.