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Finding the Fourth Proportional to 245,884.42, 339,320.01 and 138,454.90

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Solution

The fourth proportional to 245,884.42, 339,320.01 and 138,454.90 is: 191,067.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,884.42 : 339,320.01 = 138,454.90 : x
  2. Step 2: Convert to fraction form
    245,884.42/339,320.01 = 138,454.90/x
  3. Step 3: Cross multiply
    245,884.42x = 339,320.01 × 138,454.90
  4. Step 4: Simplify right side
    245,884.42x = 46,980,518,052.55
  5. Step 5: Solve for x
    x = 46,980,518,052.55/245,884.42
  6. Step 6: Final answer
    x = 191,067.49

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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.