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Finding the Fourth Proportional to 76,189.86, 105,143.49 and 45,594.41

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Solution

The fourth proportional to 76,189.86, 105,143.49 and 45,594.41 is: 62,921.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,189.86 : 105,143.49 = 45,594.41 : x
  2. Step 2: Convert to fraction form
    76,189.86/105,143.49 = 45,594.41/x
  3. Step 3: Cross multiply
    76,189.86x = 105,143.49 × 45,594.41
  4. Step 4: Simplify right side
    76,189.86x = 4,793,954,866.17
  5. Step 5: Solve for x
    x = 4,793,954,866.17/76,189.86
  6. Step 6: Final answer
    x = 62,921.17

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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.