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Finding the Fourth Proportional to 218,582.22, 327,955.95 and 85,557.54

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Solution

The fourth proportional to 218,582.22, 327,955.95 and 85,557.54 is: 128,368.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,582.22 : 327,955.95 = 85,557.54 : x
  2. Step 2: Convert to fraction form
    218,582.22/327,955.95 = 85,557.54/x
  3. Step 3: Cross multiply
    218,582.22x = 327,955.95 × 85,557.54
  4. Step 4: Simplify right side
    218,582.22x = 28,059,104,310.36
  5. Step 5: Solve for x
    x = 28,059,104,310.36/218,582.22
  6. Step 6: Final answer
    x = 128,368.65

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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.