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Finding the Fourth Proportional to 86,545.89, 119,433.42 and 47,783.79

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Solution

The fourth proportional to 86,545.89, 119,433.42 and 47,783.79 is: 65,941.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,545.89 : 119,433.42 = 47,783.79 : x
  2. Step 2: Convert to fraction form
    86,545.89/119,433.42 = 47,783.79/x
  3. Step 3: Cross multiply
    86,545.89x = 119,433.42 × 47,783.79
  4. Step 4: Simplify right side
    86,545.89x = 5,706,981,460.26
  5. Step 5: Solve for x
    x = 5,706,981,460.26/86,545.89
  6. Step 6: Final answer
    x = 65,941.68

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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.