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Finding the Fourth Proportional to 139,092.80, 208,552.80 and 79,899.20

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Solution

The fourth proportional to 139,092.80, 208,552.80 and 79,899.20 is: 119,799.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,092.80 : 208,552.80 = 79,899.20 : x
  2. Step 2: Convert to fraction form
    139,092.80/208,552.80 = 79,899.20/x
  3. Step 3: Cross multiply
    139,092.80x = 208,552.80 × 79,899.20
  4. Step 4: Simplify right side
    139,092.80x = 16,663,201,877.76
  5. Step 5: Solve for x
    x = 16,663,201,877.76/139,092.80
  6. Step 6: Final answer
    x = 119,799.17

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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.