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Finding the Fourth Proportional to 245,899.32, 339,337.72 and 138,479.88

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Solution

The fourth proportional to 245,899.32, 339,337.72 and 138,479.88 is: 191,100.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,899.32 : 339,337.72 = 138,479.88 : x
  2. Step 2: Convert to fraction form
    245,899.32/339,337.72 = 138,479.88/x
  3. Step 3: Cross multiply
    245,899.32x = 339,337.72 × 138,479.88
  4. Step 4: Simplify right side
    245,899.32x = 46,991,446,745.07
  5. Step 5: Solve for x
    x = 46,991,446,745.07/245,899.32
  6. Step 6: Final answer
    x = 191,100.35

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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.