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Finding the Fourth Proportional to 161,879.94, 242,612.10 and 77,513.69

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Solution

The fourth proportional to 161,879.94, 242,612.10 and 77,513.69 is: 116,171.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,879.94 : 242,612.10 = 77,513.69 : x
  2. Step 2: Convert to fraction form
    161,879.94/242,612.10 = 77,513.69/x
  3. Step 3: Cross multiply
    161,879.94x = 242,612.10 × 77,513.69
  4. Step 4: Simplify right side
    161,879.94x = 18,805,759,109.65
  5. Step 5: Solve for x
    x = 18,805,759,109.65/161,879.94
  6. Step 6: Final answer
    x = 116,171.03

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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.