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Finding the Fourth Proportional to 139,267.67, 208,979.12 and 75,224.52

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Solution

The fourth proportional to 139,267.67, 208,979.12 and 75,224.52 is: 112,878.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,267.67 : 208,979.12 = 75,224.52 : x
  2. Step 2: Convert to fraction form
    139,267.67/208,979.12 = 75,224.52/x
  3. Step 3: Cross multiply
    139,267.67x = 208,979.12 × 75,224.52
  4. Step 4: Simplify right side
    139,267.67x = 15,720,353,992.02
  5. Step 5: Solve for x
    x = 15,720,353,992.02/139,267.67
  6. Step 6: Final answer
    x = 112,878.70

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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.