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Finding the Fourth Proportional to 218,879.76, 328,319.60 and 52,667.76

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Solution

The fourth proportional to 218,879.76, 328,319.60 and 52,667.76 is: 79,001.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,879.76 : 328,319.60 = 52,667.76 : x
  2. Step 2: Convert to fraction form
    218,879.76/328,319.60 = 52,667.76/x
  3. Step 3: Cross multiply
    218,879.76x = 328,319.60 × 52,667.76
  4. Step 4: Simplify right side
    218,879.76x = 17,291,857,896.10
  5. Step 5: Solve for x
    x = 17,291,857,896.10/218,879.76
  6. Step 6: Final answer
    x = 79,001.63

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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.