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Finding the Fourth Proportional to 161,425.80, 242,138.70 and 43,115.40

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Solution

The fourth proportional to 161,425.80, 242,138.70 and 43,115.40 is: 64,673.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,425.80 : 242,138.70 = 43,115.40 : x
  2. Step 2: Convert to fraction form
    161,425.80/242,138.70 = 43,115.40/x
  3. Step 3: Cross multiply
    161,425.80x = 242,138.70 × 43,115.40
  4. Step 4: Simplify right side
    161,425.80x = 10,439,906,905.98
  5. Step 5: Solve for x
    x = 10,439,906,905.98/161,425.80
  6. Step 6: Final answer
    x = 64,673.10

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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.