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Finding the Fourth Proportional to 121,999.99, 168,359.95 and 68,285

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Solution

The fourth proportional to 121,999.99, 168,359.95 and 68,285 is: 94,233.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,999.99 : 168,359.95 = 68,285 : x
  2. Step 2: Convert to fraction form
    121,999.99/168,359.95 = 68,285/x
  3. Step 3: Cross multiply
    121,999.99x = 168,359.95 × 68,285
  4. Step 4: Simplify right side
    121,999.99x = 11,496,459,185.75
  5. Step 5: Solve for x
    x = 11,496,459,185.75/121,999.99
  6. Step 6: Final answer
    x = 94,233.28

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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.