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Finding the Fourth Proportional to 172,407.88, 237,908.10 and 100,779.58

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Solution

The fourth proportional to 172,407.88, 237,908.10 and 100,779.58 is: 139,067.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,407.88 : 237,908.10 = 100,779.58 : x
  2. Step 2: Convert to fraction form
    172,407.88/237,908.10 = 100,779.58/x
  3. Step 3: Cross multiply
    172,407.88x = 237,908.10 × 100,779.58
  4. Step 4: Simplify right side
    172,407.88x = 23,976,278,396.60
  5. Step 5: Solve for x
    x = 23,976,278,396.60/172,407.88
  6. Step 6: Final answer
    x = 139,067.18

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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.