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Finding the Fourth Proportional to 219,744.40, 329,551.80 and 86,580.40

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Solution

The fourth proportional to 219,744.40, 329,551.80 and 86,580.40 is: 129,845.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,744.40 : 329,551.80 = 86,580.40 : x
  2. Step 2: Convert to fraction form
    219,744.40/329,551.80 = 86,580.40/x
  3. Step 3: Cross multiply
    219,744.40x = 329,551.80 × 86,580.40
  4. Step 4: Simplify right side
    219,744.40x = 28,532,726,664.72
  5. Step 5: Solve for x
    x = 28,532,726,664.72/219,744.40
  6. Step 6: Final answer
    x = 129,845.07

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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.