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Finding the Fourth Proportional to 316,160.84, 436,310.58 and 172,929.32

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Solution

The fourth proportional to 316,160.84, 436,310.58 and 172,929.32 is: 238,647.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,160.84 : 436,310.58 = 172,929.32 : x
  2. Step 2: Convert to fraction form
    316,160.84/436,310.58 = 172,929.32/x
  3. Step 3: Cross multiply
    316,160.84x = 436,310.58 × 172,929.32
  4. Step 4: Simplify right side
    316,160.84x = 75,450,891,908.21
  5. Step 5: Solve for x
    x = 75,450,891,908.21/316,160.84
  6. Step 6: Final answer
    x = 238,647.18

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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.