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Finding the Fourth Proportional to 316,161.84, 436,311.96 and 172,930.32

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Solution

The fourth proportional to 316,161.84, 436,311.96 and 172,930.32 is: 238,648.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,161.84 : 436,311.96 = 172,930.32 : x
  2. Step 2: Convert to fraction form
    316,161.84/436,311.96 = 172,930.32/x
  3. Step 3: Cross multiply
    316,161.84x = 436,311.96 × 172,930.32
  4. Step 4: Simplify right side
    316,161.84x = 75,451,566,862.63
  5. Step 5: Solve for x
    x = 75,451,566,862.63/316,161.84
  6. Step 6: Final answer
    x = 238,648.56

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1.5x scale

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.