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Finding the Fourth Proportional to 118,839.77, 178,139.69 and 74,497.67

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Solution

The fourth proportional to 118,839.77, 178,139.69 and 74,497.67 is: 111,671.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,839.77 : 178,139.69 = 74,497.67 : x
  2. Step 2: Convert to fraction form
    118,839.77/178,139.69 = 74,497.67/x
  3. Step 3: Cross multiply
    118,839.77x = 178,139.69 × 74,497.67
  4. Step 4: Simplify right side
    118,839.77x = 13,270,991,839.52
  5. Step 5: Solve for x
    x = 13,270,991,839.52/118,839.77
  6. Step 6: Final answer
    x = 111,671.30

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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.