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Finding the Fourth Proportional to 142,969.60, 197,309.76 and 79,313.92

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Solution

The fourth proportional to 142,969.60, 197,309.76 and 79,313.92 is: 109,459.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,969.60 : 197,309.76 = 79,313.92 : x
  2. Step 2: Convert to fraction form
    142,969.60/197,309.76 = 79,313.92/x
  3. Step 3: Cross multiply
    142,969.60x = 197,309.76 × 79,313.92
  4. Step 4: Simplify right side
    142,969.60x = 15,649,410,519.86
  5. Step 5: Solve for x
    x = 15,649,410,519.86/142,969.60
  6. Step 6: Final answer
    x = 109,459.71

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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.