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Finding the Fourth Proportional to 121,298.78, 167,393.45 and 66,852.89

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Solution

The fourth proportional to 121,298.78, 167,393.45 and 66,852.89 is: 92,257.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,298.78 : 167,393.45 = 66,852.89 : x
  2. Step 2: Convert to fraction form
    121,298.78/167,393.45 = 66,852.89/x
  3. Step 3: Cross multiply
    121,298.78x = 167,393.45 × 66,852.89
  4. Step 4: Simplify right side
    121,298.78x = 11,190,735,899.57
  5. Step 5: Solve for x
    x = 11,190,735,899.57/121,298.78
  6. Step 6: Final answer
    x = 92,257.61

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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.