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Finding the Fourth Proportional to 251,379.64, 346,917.92 and 138,225.88

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Solution

The fourth proportional to 251,379.64, 346,917.92 and 138,225.88 is: 190,759.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,379.64 : 346,917.92 = 138,225.88 : x
  2. Step 2: Convert to fraction form
    251,379.64/346,917.92 = 138,225.88/x
  3. Step 3: Cross multiply
    251,379.64x = 346,917.92 × 138,225.88
  4. Step 4: Simplify right side
    251,379.64x = 47,953,034,779.77
  5. Step 5: Solve for x
    x = 47,953,034,779.77/251,379.64
  6. Step 6: Final answer
    x = 190,759.42

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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.