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Finding the Fourth Proportional to 219,947.60, 329,878.20 and 72,203.60

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Solution

The fourth proportional to 219,947.60, 329,878.20 and 72,203.60 is: 108,291.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,947.60 : 329,878.20 = 72,203.60 : x
  2. Step 2: Convert to fraction form
    219,947.60/329,878.20 = 72,203.60/x
  3. Step 3: Cross multiply
    219,947.60x = 329,878.20 × 72,203.60
  4. Step 4: Simplify right side
    219,947.60x = 23,818,393,601.52
  5. Step 5: Solve for x
    x = 23,818,393,601.52/219,947.60
  6. Step 6: Final answer
    x = 108,291.22

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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.