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Finding the Fourth Proportional to 108,829.80, 163,071.90 and 80,836.20

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Solution

The fourth proportional to 108,829.80, 163,071.90 and 80,836.20 is: 121,125.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,829.80 : 163,071.90 = 80,836.20 : x
  2. Step 2: Convert to fraction form
    108,829.80/163,071.90 = 80,836.20/x
  3. Step 3: Cross multiply
    108,829.80x = 163,071.90 × 80,836.20
  4. Step 4: Simplify right side
    108,829.80x = 13,182,112,722.78
  5. Step 5: Solve for x
    x = 13,182,112,722.78/108,829.80
  6. Step 6: Final answer
    x = 121,125.95

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1.5x scale

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.