Home / 109,787.20-164,583.60-72,365.20

Finding the Fourth Proportional to 109,787.20, 164,583.60 and 72,365.20

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Solution

The fourth proportional to 109,787.20, 164,583.60 and 72,365.20 is: 108,483.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,787.20 : 164,583.60 = 72,365.20 : x
  2. Step 2: Convert to fraction form
    109,787.20/164,583.60 = 72,365.20/x
  3. Step 3: Cross multiply
    109,787.20x = 164,583.60 × 72,365.20
  4. Step 4: Simplify right side
    109,787.20x = 11,910,125,130.72
  5. Step 5: Solve for x
    x = 11,910,125,130.72/109,787.20
  6. Step 6: Final answer
    x = 108,483.73

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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.