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Finding the Fourth Proportional to 118,709.84, 178,078.82 and 74,340.26

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Solution

The fourth proportional to 118,709.84, 178,078.82 and 74,340.26 is: 111,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,709.84 : 178,078.82 = 74,340.26 : x
  2. Step 2: Convert to fraction form
    118,709.84/178,078.82 = 74,340.26/x
  3. Step 3: Cross multiply
    118,709.84x = 178,078.82 × 74,340.26
  4. Step 4: Simplify right side
    118,709.84x = 13,238,425,407.59
  5. Step 5: Solve for x
    x = 13,238,425,407.59/118,709.84
  6. Step 6: Final answer
    x = 111,519.20

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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.