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Finding the Fourth Proportional to 121,997.99, 168,357.20 and 68,283

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Solution

The fourth proportional to 121,997.99, 168,357.20 and 68,283 is: 94,230.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,997.99 : 168,357.20 = 68,283 : x
  2. Step 2: Convert to fraction form
    121,997.99/168,357.20 = 68,283/x
  3. Step 3: Cross multiply
    121,997.99x = 168,357.20 × 68,283
  4. Step 4: Simplify right side
    121,997.99x = 11,495,934,346.19
  5. Step 5: Solve for x
    x = 11,495,934,346.19/121,997.99
  6. Step 6: Final answer
    x = 94,230.53

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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.