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Finding the Fourth Proportional to 219,486.80, 329,244.60 and 61,720.40

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Solution

The fourth proportional to 219,486.80, 329,244.60 and 61,720.40 is: 92,584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,486.80 : 329,244.60 = 61,720.40 : x
  2. Step 2: Convert to fraction form
    219,486.80/329,244.60 = 61,720.40/x
  3. Step 3: Cross multiply
    219,486.80x = 329,244.60 × 61,720.40
  4. Step 4: Simplify right side
    219,486.80x = 20,321,108,409.84
  5. Step 5: Solve for x
    x = 20,321,108,409.84/219,486.80
  6. Step 6: Final answer
    x = 92,584.65

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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.