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Finding the Fourth Proportional to 121,999.45, 168,359.18 and 68,284.45

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Solution

The fourth proportional to 121,999.45, 168,359.18 and 68,284.45 is: 94,232.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,999.45 : 168,359.18 = 68,284.45 : x
  2. Step 2: Convert to fraction form
    121,999.45/168,359.18 = 68,284.45/x
  3. Step 3: Cross multiply
    121,999.45x = 168,359.18 × 68,284.45
  4. Step 4: Simplify right side
    121,999.45x = 11,496,314,008.75
  5. Step 5: Solve for x
    x = 11,496,314,008.75/121,999.45
  6. Step 6: Final answer
    x = 94,232.51

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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.