Home / 108,690.72-163,286.28-76,743.60

Finding the Fourth Proportional to 108,690.72, 163,286.28 and 76,743.60

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Solution

The fourth proportional to 108,690.72, 163,286.28 and 76,743.60 is: 115,292.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,690.72 : 163,286.28 = 76,743.60 : x
  2. Step 2: Convert to fraction form
    108,690.72/163,286.28 = 76,743.60/x
  3. Step 3: Cross multiply
    108,690.72x = 163,286.28 × 76,743.60
  4. Step 4: Simplify right side
    108,690.72x = 12,531,176,957.81
  5. Step 5: Solve for x
    x = 12,531,176,957.81/108,690.72
  6. Step 6: Final answer
    x = 115,292.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.