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Finding the Fourth Proportional to 108,223.40, 162,335.10 and 81,979.40

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Solution

The fourth proportional to 108,223.40, 162,335.10 and 81,979.40 is: 122,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,223.40 : 162,335.10 = 81,979.40 : x
  2. Step 2: Convert to fraction form
    108,223.40/162,335.10 = 81,979.40/x
  3. Step 3: Cross multiply
    108,223.40x = 162,335.10 × 81,979.40
  4. Step 4: Simplify right side
    108,223.40x = 13,308,134,096.94
  5. Step 5: Solve for x
    x = 13,308,134,096.94/108,223.40
  6. Step 6: Final answer
    x = 122,969.10

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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.