Home / 108,986.20-163,479.30-91,360.60

Finding the Fourth Proportional to 108,986.20, 163,479.30 and 91,360.60

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Solution

The fourth proportional to 108,986.20, 163,479.30 and 91,360.60 is: 137,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,986.20 : 163,479.30 = 91,360.60 : x
  2. Step 2: Convert to fraction form
    108,986.20/163,479.30 = 91,360.60/x
  3. Step 3: Cross multiply
    108,986.20x = 163,479.30 × 91,360.60
  4. Step 4: Simplify right side
    108,986.20x = 14,935,566,935.58
  5. Step 5: Solve for x
    x = 14,935,566,935.58/108,986.20
  6. Step 6: Final answer
    x = 137,040.90

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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.