Home / 122,431.25-168,971.61-68,719.20

Finding the Fourth Proportional to 122,431.25, 168,971.61 and 68,719.20

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Solution

The fourth proportional to 122,431.25, 168,971.61 and 68,719.20 is: 94,841.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,431.25 : 168,971.61 = 68,719.20 : x
  2. Step 2: Convert to fraction form
    122,431.25/168,971.61 = 68,719.20/x
  3. Step 3: Cross multiply
    122,431.25x = 168,971.61 × 68,719.20
  4. Step 4: Simplify right side
    122,431.25x = 11,611,593,861.91
  5. Step 5: Solve for x
    x = 11,611,593,861.91/122,431.25
  6. Step 6: Final answer
    x = 94,841.75

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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.