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Finding the Fourth Proportional to 311,421.62, 429,761.82 and 168,181.68

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Solution

The fourth proportional to 311,421.62, 429,761.82 and 168,181.68 is: 232,090.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,421.62 : 429,761.82 = 168,181.68 : x
  2. Step 2: Convert to fraction form
    311,421.62/429,761.82 = 168,181.68/x
  3. Step 3: Cross multiply
    311,421.62x = 429,761.82 × 168,181.68
  4. Step 4: Simplify right side
    311,421.62x = 72,278,064,887.46
  5. Step 5: Solve for x
    x = 72,278,064,887.46/311,421.62
  6. Step 6: Final answer
    x = 232,090.71

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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.