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Finding the Fourth Proportional to 215,754.52, 297,879.60 and 139,307.80

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Solution

The fourth proportional to 215,754.52, 297,879.60 and 139,307.80 is: 192,334.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,754.52 : 297,879.60 = 139,307.80 : x
  2. Step 2: Convert to fraction form
    215,754.52/297,879.60 = 139,307.80/x
  3. Step 3: Cross multiply
    215,754.52x = 297,879.60 × 139,307.80
  4. Step 4: Simplify right side
    215,754.52x = 41,496,951,740.88
  5. Step 5: Solve for x
    x = 41,496,951,740.88/215,754.52
  6. Step 6: Final answer
    x = 192,334.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.