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Finding the Fourth Proportional to 352,139.70, 528,209.55 and 115,425.30

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Solution

The fourth proportional to 352,139.70, 528,209.55 and 115,425.30 is: 173,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,139.70 : 528,209.55 = 115,425.30 : x
  2. Step 2: Convert to fraction form
    352,139.70/528,209.55 = 115,425.30/x
  3. Step 3: Cross multiply
    352,139.70x = 528,209.55 × 115,425.30
  4. Step 4: Simplify right side
    352,139.70x = 60,968,745,771.62
  5. Step 5: Solve for x
    x = 60,968,745,771.62/352,139.70
  6. Step 6: Final answer
    x = 173,137.95

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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.