Home / 120,915.48-166,863.06-66,467.28

Finding the Fourth Proportional to 120,915.48, 166,863.06 and 66,467.28

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Solution

The fourth proportional to 120,915.48, 166,863.06 and 66,467.28 is: 91,724.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915.48 : 166,863.06 = 66,467.28 : x
  2. Step 2: Convert to fraction form
    120,915.48/166,863.06 = 66,467.28/x
  3. Step 3: Cross multiply
    120,915.48x = 166,863.06 × 66,467.28
  4. Step 4: Simplify right side
    120,915.48x = 11,090,933,730.68
  5. Step 5: Solve for x
    x = 11,090,933,730.68/120,915.48
  6. Step 6: Final answer
    x = 91,724.68

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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.