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Finding the Fourth Proportional to 118,754.82, 178,140.87 and 39,868.38

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Solution

The fourth proportional to 118,754.82, 178,140.87 and 39,868.38 is: 59,805.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,754.82 : 178,140.87 = 39,868.38 : x
  2. Step 2: Convert to fraction form
    118,754.82/178,140.87 = 39,868.38/x
  3. Step 3: Cross multiply
    118,754.82x = 178,140.87 × 39,868.38
  4. Step 4: Simplify right side
    118,754.82x = 7,102,187,898.69
  5. Step 5: Solve for x
    x = 7,102,187,898.69/118,754.82
  6. Step 6: Final answer
    x = 59,805.47

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1.5x scale

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.