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Finding the Fourth Proportional to 77,685.50, 116,528.25 and 19,317.50

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Solution

The fourth proportional to 77,685.50, 116,528.25 and 19,317.50 is: 28,976.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,685.50 : 116,528.25 = 19,317.50 : x
  2. Step 2: Convert to fraction form
    77,685.50/116,528.25 = 19,317.50/x
  3. Step 3: Cross multiply
    77,685.50x = 116,528.25 × 19,317.50
  4. Step 4: Simplify right side
    77,685.50x = 2,251,034,469.38
  5. Step 5: Solve for x
    x = 2,251,034,469.38/77,685.50
  6. Step 6: Final answer
    x = 28,976.25

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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.