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Finding the Fourth Proportional to 117,540, 176,309.64 and 42,660.05

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Solution

The fourth proportional to 117,540, 176,309.64 and 42,660.05 is: 63,989.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,540 : 176,309.64 = 42,660.05 : x
  2. Step 2: Convert to fraction form
    117,540/176,309.64 = 42,660.05/x
  3. Step 3: Cross multiply
    117,540x = 176,309.64 × 42,660.05
  4. Step 4: Simplify right side
    117,540x = 7,521,377,176.33
  5. Step 5: Solve for x
    x = 7,521,377,176.33/117,540
  6. Step 6: Final answer
    x = 63,989.94

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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.