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Finding the Fourth Proportional to 161,976.20, 242,858.70 and 145,387.40

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Solution

The fourth proportional to 161,976.20, 242,858.70 and 145,387.40 is: 217,986.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,976.20 : 242,858.70 = 145,387.40 : x
  2. Step 2: Convert to fraction form
    161,976.20/242,858.70 = 145,387.40/x
  3. Step 3: Cross multiply
    161,976.20x = 242,858.70 × 145,387.40
  4. Step 4: Simplify right side
    161,976.20x = 35,308,594,960.38
  5. Step 5: Solve for x
    x = 35,308,594,960.38/161,976.20
  6. Step 6: Final answer
    x = 217,986.32

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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.