Home / 313,690,638.92-432,890,689.04-172,558,821.42

Finding the Fourth Proportional to 313,690,638.92, 432,890,689.04 and 172,558,821.42

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Solution

The fourth proportional to 313,690,638.92, 432,890,689.04 and 172,558,821.42 is: 238,129,857.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,690,638.92 : 432,890,689.04 = 172,558,821.42 : x
  2. Step 2: Convert to fraction form
    313,690,638.92/432,890,689.04 = 172,558,821.42/x
  3. Step 3: Cross multiply
    313,690,638.92x = 432,890,689.04 × 172,558,821.42
  4. Step 4: Simplify right side
    313,690,638.92x = 74,699,107,104,434,112
  5. Step 5: Solve for x
    x = 74,699,107,104,434,112/313,690,638.92
  6. Step 6: Final answer
    x = 238,129,857.37

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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.