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Finding the Fourth Proportional to 117,593.69, 162,178.74 and 79,346.70

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Solution

The fourth proportional to 117,593.69, 162,178.74 and 79,346.70 is: 109,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,593.69 : 162,178.74 = 79,346.70 : x
  2. Step 2: Convert to fraction form
    117,593.69/162,178.74 = 79,346.70/x
  3. Step 3: Cross multiply
    117,593.69x = 162,178.74 × 79,346.70
  4. Step 4: Simplify right side
    117,593.69x = 12,868,347,829.16
  5. Step 5: Solve for x
    x = 12,868,347,829.16/117,593.69
  6. Step 6: Final answer
    x = 109,430.60

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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.