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Finding the Fourth Proportional to 245,311.79, 338,539.86 and 137,881.49

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Solution

The fourth proportional to 245,311.79, 338,539.86 and 137,881.49 is: 190,281.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,311.79 : 338,539.86 = 137,881.49 : x
  2. Step 2: Convert to fraction form
    245,311.79/338,539.86 = 137,881.49/x
  3. Step 3: Cross multiply
    245,311.79x = 338,539.86 × 137,881.49
  4. Step 4: Simplify right side
    245,311.79x = 46,678,378,628.49
  5. Step 5: Solve for x
    x = 46,678,378,628.49/245,311.79
  6. Step 6: Final answer
    x = 190,281.84

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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.