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Finding the Fourth Proportional to 161,979.40, 242,969.10 and 91,995.40

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Solution

The fourth proportional to 161,979.40, 242,969.10 and 91,995.40 is: 137,993.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,979.40 : 242,969.10 = 91,995.40 : x
  2. Step 2: Convert to fraction form
    161,979.40/242,969.10 = 91,995.40/x
  3. Step 3: Cross multiply
    161,979.40x = 242,969.10 × 91,995.40
  4. Step 4: Simplify right side
    161,979.40x = 22,352,039,542.14
  5. Step 5: Solve for x
    x = 22,352,039,542.14/161,979.40
  6. Step 6: Final answer
    x = 137,993.10

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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.