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Finding the Fourth Proportional to 245,801.42, 339,193.05 and 138,367.88

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Solution

The fourth proportional to 245,801.42, 339,193.05 and 138,367.88 is: 190,940.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,801.42 : 339,193.05 = 138,367.88 : x
  2. Step 2: Convert to fraction form
    245,801.42/339,193.05 = 138,367.88/x
  3. Step 3: Cross multiply
    245,801.42x = 339,193.05 × 138,367.88
  4. Step 4: Simplify right side
    245,801.42x = 46,933,421,543.27
  5. Step 5: Solve for x
    x = 46,933,421,543.27/245,801.42
  6. Step 6: Final answer
    x = 190,940.40

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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.