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Finding the Fourth Proportional to 172,508.58, 258,675.36 and 78,934.14

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Solution

The fourth proportional to 172,508.58, 258,675.36 and 78,934.14 is: 118,361.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,508.58 : 258,675.36 = 78,934.14 : x
  2. Step 2: Convert to fraction form
    172,508.58/258,675.36 = 78,934.14/x
  3. Step 3: Cross multiply
    172,508.58x = 258,675.36 × 78,934.14
  4. Step 4: Simplify right side
    172,508.58x = 20,418,317,080.79
  5. Step 5: Solve for x
    x = 20,418,317,080.79/172,508.58
  6. Step 6: Final answer
    x = 118,361.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.