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Finding the Fourth Proportional to 219,009.30, 328,287.15 and 118,958.10

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Solution

The fourth proportional to 219,009.30, 328,287.15 and 118,958.10 is: 178,313.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,009.30 : 328,287.15 = 118,958.10 : x
  2. Step 2: Convert to fraction form
    219,009.30/328,287.15 = 118,958.10/x
  3. Step 3: Cross multiply
    219,009.30x = 328,287.15 × 118,958.10
  4. Step 4: Simplify right side
    219,009.30x = 39,052,415,618.42
  5. Step 5: Solve for x
    x = 39,052,415,618.42/219,009.30
  6. Step 6: Final answer
    x = 178,313.96

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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.