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Finding the Fourth Proportional to 218,693.20, 328,039.80 and 108,101.20

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Solution

The fourth proportional to 218,693.20, 328,039.80 and 108,101.20 is: 162,151.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,693.20 : 328,039.80 = 108,101.20 : x
  2. Step 2: Convert to fraction form
    218,693.20/328,039.80 = 108,101.20/x
  3. Step 3: Cross multiply
    218,693.20x = 328,039.80 × 108,101.20
  4. Step 4: Simplify right side
    218,693.20x = 35,461,496,027.76
  5. Step 5: Solve for x
    x = 35,461,496,027.76/218,693.20
  6. Step 6: Final answer
    x = 162,151.80

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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.