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Finding the Fourth Proportional to 121,999.94, 168,358.26 and 68,284.94

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Solution

The fourth proportional to 121,999.94, 168,358.26 and 68,284.94 is: 94,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,999.94 : 168,358.26 = 68,284.94 : x
  2. Step 2: Convert to fraction form
    121,999.94/168,358.26 = 68,284.94/x
  3. Step 3: Cross multiply
    121,999.94x = 168,358.26 × 68,284.94
  4. Step 4: Simplify right side
    121,999.94x = 11,496,332,840.81
  5. Step 5: Solve for x
    x = 11,496,332,840.81/121,999.94
  6. Step 6: Final answer
    x = 94,232.29

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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.