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Finding the Fourth Proportional to 108,638.80, 162,958.20 and 89,976.40

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Solution

The fourth proportional to 108,638.80, 162,958.20 and 89,976.40 is: 134,964.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,638.80 : 162,958.20 = 89,976.40 : x
  2. Step 2: Convert to fraction form
    108,638.80/162,958.20 = 89,976.40/x
  3. Step 3: Cross multiply
    108,638.80x = 162,958.20 × 89,976.40
  4. Step 4: Simplify right side
    108,638.80x = 14,662,392,186.48
  5. Step 5: Solve for x
    x = 14,662,392,186.48/108,638.80
  6. Step 6: Final answer
    x = 134,964.60

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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.