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Finding the Fourth Proportional to 218,879.12, 328,289.24 and 61,123.52

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Solution

The fourth proportional to 218,879.12, 328,289.24 and 61,123.52 is: 91,677.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,879.12 : 328,289.24 = 61,123.52 : x
  2. Step 2: Convert to fraction form
    218,879.12/328,289.24 = 61,123.52/x
  3. Step 3: Cross multiply
    218,879.12x = 328,289.24 × 61,123.52
  4. Step 4: Simplify right side
    218,879.12x = 20,066,193,926.92
  5. Step 5: Solve for x
    x = 20,066,193,926.92/218,879.12
  6. Step 6: Final answer
    x = 91,677.06

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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.