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Finding the Fourth Proportional to 245,873.22, 339,268.95 and 138,421.86

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Solution

The fourth proportional to 245,873.22, 339,268.95 and 138,421.86 is: 191,001.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,873.22 : 339,268.95 = 138,421.86 : x
  2. Step 2: Convert to fraction form
    245,873.22/339,268.95 = 138,421.86/x
  3. Step 3: Cross multiply
    245,873.22x = 339,268.95 × 138,421.86
  4. Step 4: Simplify right side
    245,873.22x = 46,962,239,099.25
  5. Step 5: Solve for x
    x = 46,962,239,099.25/245,873.22
  6. Step 6: Final answer
    x = 191,001.85

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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.