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Finding the Fourth Proportional to 219,784.40, 329,657.40 and 72,040.40

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Solution

The fourth proportional to 219,784.40, 329,657.40 and 72,040.40 is: 108,054.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,784.40 : 329,657.40 = 72,040.40 : x
  2. Step 2: Convert to fraction form
    219,784.40/329,657.40 = 72,040.40/x
  3. Step 3: Cross multiply
    219,784.40x = 329,657.40 × 72,040.40
  4. Step 4: Simplify right side
    219,784.40x = 23,748,650,958.96
  5. Step 5: Solve for x
    x = 23,748,650,958.96/219,784.40
  6. Step 6: Final answer
    x = 108,054.31

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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.