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Finding the Fourth Proportional to 78,923.79, 108,917.16 and 43,114.38

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Solution

The fourth proportional to 78,923.79, 108,917.16 and 43,114.38 is: 59,499.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,923.79 : 108,917.16 = 43,114.38 : x
  2. Step 2: Convert to fraction form
    78,923.79/108,917.16 = 43,114.38/x
  3. Step 3: Cross multiply
    78,923.79x = 108,917.16 × 43,114.38
  4. Step 4: Simplify right side
    78,923.79x = 4,695,895,824.76
  5. Step 5: Solve for x
    x = 4,695,895,824.76/78,923.79
  6. Step 6: Final answer
    x = 59,499.12

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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.