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Finding the Fourth Proportional to 147,920.80, 221,913.60 and 73,076.80

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Solution

The fourth proportional to 147,920.80, 221,913.60 and 73,076.80 is: 109,631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,920.80 : 221,913.60 = 73,076.80 : x
  2. Step 2: Convert to fraction form
    147,920.80/221,913.60 = 73,076.80/x
  3. Step 3: Cross multiply
    147,920.80x = 221,913.60 × 73,076.80
  4. Step 4: Simplify right side
    147,920.80x = 16,216,735,764.48
  5. Step 5: Solve for x
    x = 16,216,735,764.48/147,920.80
  6. Step 6: Final answer
    x = 109,631.21

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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.