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Finding the Fourth Proportional to 77,643.72, 107,148.42 and 44,116.20

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Solution

The fourth proportional to 77,643.72, 107,148.42 and 44,116.20 is: 60,880.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,643.72 : 107,148.42 = 44,116.20 : x
  2. Step 2: Convert to fraction form
    77,643.72/107,148.42 = 44,116.20/x
  3. Step 3: Cross multiply
    77,643.72x = 107,148.42 × 44,116.20
  4. Step 4: Simplify right side
    77,643.72x = 4,726,981,126.40
  5. Step 5: Solve for x
    x = 4,726,981,126.40/77,643.72
  6. Step 6: Final answer
    x = 60,880.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.