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Finding the Fourth Proportional to 245,798.42, 339,188.92 and 138,364.88

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Solution

The fourth proportional to 245,798.42, 339,188.92 and 138,364.88 is: 190,936.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,798.42 : 339,188.92 = 138,364.88 : x
  2. Step 2: Convert to fraction form
    245,798.42/339,188.92 = 138,364.88/x
  3. Step 3: Cross multiply
    245,798.42x = 339,188.92 × 138,364.88
  4. Step 4: Simplify right side
    245,798.42x = 46,931,832,171.27
  5. Step 5: Solve for x
    x = 46,931,832,171.27/245,798.42
  6. Step 6: Final answer
    x = 190,936.27

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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.