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Finding the Fourth Proportional to 117,812.68, 176,688 and 80,365.78

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Solution

The fourth proportional to 117,812.68, 176,688 and 80,365.78 is: 120,527.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,812.68 : 176,688 = 80,365.78 : x
  2. Step 2: Convert to fraction form
    117,812.68/176,688 = 80,365.78/x
  3. Step 3: Cross multiply
    117,812.68x = 176,688 × 80,365.78
  4. Step 4: Simplify right side
    117,812.68x = 14,199,668,936.64
  5. Step 5: Solve for x
    x = 14,199,668,936.64/117,812.68
  6. Step 6: Final answer
    x = 120,527.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.