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Finding the Fourth Proportional to 77,641.93, 107,142.51 and 47,477.53

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Solution

The fourth proportional to 77,641.93, 107,142.51 and 47,477.53 is: 65,516.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,641.93 : 107,142.51 = 47,477.53 : x
  2. Step 2: Convert to fraction form
    77,641.93/107,142.51 = 47,477.53/x
  3. Step 3: Cross multiply
    77,641.93x = 107,142.51 × 47,477.53
  4. Step 4: Simplify right side
    77,641.93x = 5,086,861,732.80
  5. Step 5: Solve for x
    x = 5,086,861,732.80/77,641.93
  6. Step 6: Final answer
    x = 65,516.94

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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.